JP2003136826A - Multicolor printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, since platemaking and plate supplying units and plate delivering units of the same number as that of printing drums are required, the size of the overall stencil printer is increased, and a stencil printer resultantly becomes expensive or particularly since a power supply line and an operation control line are connected when the platemaking and plate supply units are moved, processes of the signal line and each line become difficult to cause an excess cost to be applied. SOLUTION: The multicolor printer comprises one platemaking unit 1 fixed to a body frame 99 side, one plate delivering and plate supplying unit 2 movable between printing drums A to D and a first position P1 near the unit 1 and having a plate delivering means 40 for separating the used masters 3 on the drum A to D and delivering the masters 3 and a plate supplying and guiding unit 43 receiving and holding the distal ends of the platemade master 3 at the first position P1 for guiding and conveying the plates to the drums A to D, and a moving means 38 for moving the unit 2 to the first position P1 between the drums A to D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor printing apparatus, and more particularly to a multicolor stencil printing apparatus having a plurality of printing drums and capable of multicolor overprinting. Related to a printing device.

[0002]

2. Description of the Related Art In a stencil printing method for carrying out multicolor overprinting using a printing drum having a heat-sensitive stencil sheet (hereinafter referred to as "master"), which has been prepressed on the outer peripheral surface, in the stencil printing method On the other hand, there is known a primitive one in which a printing drum unit configured to be detachable is attached / detached and replaced, and printing paper is repeatedly passed and printed. However, in the above method, since the printing drum unit has to be detached and replaced for each printing of each color, its workability is poor, and the print image position is likely to be misaligned or dirty, and the total printing time is long. There was a problem.

Therefore, in order to improve the above method, in one stencil printing machine, a plurality of printing drums having ink supply means of different colors for printing each color are arranged side by side, and the printing unit in the plurality of printing drums is held. A method has been proposed in which one sheet of printing paper is continuously passed through (a portion where the printing paper is pressed by the pressing means to the master on the printing drum by the pressing means to form a nip portion) to perform multicolor overprinting. . In a stencil printing apparatus that holds a plurality of printing drums having ink supplying means of different colors side by side,
Several methods are proposed for arranging the plate supply device that supplies the master that has already been made to each printing drum and the plate discharging device that separates and discharges the used master from each printing drum. Has been done.

For example, Japanese Patent Laid-Open No. 6-32038 (Patent No. 3)
In the technique described in Japanese Patent Publication No. 066193), a plate making plate feeding device (plate making base paper sending means) and a plate discharging device (plate discharging means) are arranged for each printing drum (plate cylinder). In this case, as many plate-making and plate-supplying devices and plate-discharging devices as the number of printing drums are required. For example, in the technique described in Japanese Patent Publication No. 7-17083, one plate making plate feeding device (base paper feeding device) and a plate discharging device (disused plate collecting device) form a pair and move integrally between the respective printing drums, A plate feeding operation and a plate discharging operation can be performed for each printing drum. In this case, one plate-making plate supplying device and one plate discharging device are sufficient regardless of the number of printing drums. Further, for example, in the technique described in Japanese Patent Application Laid-Open No. 2000-88417, one plate making plate feeding apparatus (plate making unit) moves between the printing drums via a moving mechanism so that a plate feeding operation can be performed. Has become. In this case, one plate-making and plate-supplying device is sufficient regardless of the number of printing drums.

[0005]

However, each of the above techniques has the following problems. JP-A-6-
According to the technique described in Japanese Patent No. 32038, since the same number of plate-making and plate-supplying devices and plate-discharging devices as the number of printing drums are required, the size of the entire stencil printing device becomes large, and the cost also increases, resulting in high cost. There is a problem that it becomes a stencil printer. In particular, in the case of a digital heat-sensitive plate making plate making apparatus, since the thermal head for perforating plate making is very expensive, the plate making plate making apparatus having it becomes costly, and the price of the stencil printing apparatus becomes high. It will have a big impact. Even if the user has a plurality of plate-making and plate-making devices, if a plurality of originals of different colors are read using the black-and-white scanner device and the read image data is sent to the plate-making and plate-making device, those plate-making and plate-making devices are eventually used. There is a problem that the simultaneous plate making and plate feeding operation of the apparatus is impossible.

In the technique disclosed in Japanese Examined Patent Publication No. 7-17083, one plate-making and plate-feeding device and the plate-ejection device form a pair and move integrally between the printing drums. However, if the plate making plate feeding device and the plate discharging device are paired, it becomes a considerably large unit, and therefore it is necessary to move it as shown in FIG. 2 of the publication. It requires a large space and a special mechanism and drive device. Along with this, the inertia (inertia) of the above unit becomes large, and the moving speed and the stopping accuracy of the unit naturally come to the limit, so that the total time required for plate making also becomes large. .

Further, for the plate-making plate feeding apparatus, a large number of signal lines for transmitting the image information of the document and a power supply line (power supply line) for operating the plate-making plate feeding apparatus and an operation control line. Since the (operation control line) is connected, moving the plate making and plate feeding device also makes it difficult to process the signal lines and each line, which causes an excessive cost. ing. Further, in order to perform plate feeding with accuracy and high reliability, it is necessary to accurately position the plate making plate feeding apparatus with respect to each printing drum. I will end up.

Next, in the technique described in Japanese Patent Laid-Open No. 2000-88417, a system in which only the plate making and feeding device is moved is adopted, but in this case, as many plate discharging devices as the number of printing drums are required. Therefore, it becomes necessary to provide those plate discharging devices at a position away from the moving range of the plate making and plate feeding device, and it becomes difficult to arrange and layout them.
There is a problem that the cost for the same number of plate discharging devices also becomes large. Further, similar to the problem in the technique disclosed in Japanese Patent Publication No. 7-17083, moving the plate making and plate feeding apparatus requires a large number of signal lines for transmitting image information of a document, power supply lines and operation control lines. However, there is also a problem that the processing becomes difficult and the cost becomes excessive. Similarly, in order to perform accurate and highly reliable plate feeding, it is necessary to accurately position the plate making plate feeding apparatus with respect to each printing drum. turn into.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and in a printing apparatus including a stencil printing apparatus capable of performing multicolor overprinting by sequentially pressing printing paper onto a plurality of printing drums, It is a main object of the present invention to provide a new multicolor printing apparatus capable of performing multicolor overprinting with one plate making plate feeding apparatus and one plate discharging apparatus by solving various problems of the prior art. I am trying. It is an object of the invention of each claim to realize a multi-color printing device that achieves each effect described below.

[0010]

In order to solve the above-mentioned problems and to achieve the above objects, the present invention adopts the following means and configurations in the inventions for each claim. The invention according to claim 1 has a plurality of printing drums around which the masters having been prepressed are wound around the outer peripheral surface, and the printing papers are sequentially pressed while supplying ink to the masters having been prepressed on these printing drums. In a multicolor printing apparatus capable of color overprinting, one plate making apparatus fixed to the main body of the printing apparatus and provided with a plate making means for making a master, and between each of the printing drums and close to the plate making apparatus. The printing unit is movable to and from the first position, and a plate discharging unit that separates and discharges the used master on each of the printing drums, and receives and holds a part of the plate-made master at the first position to hold each of the printings. One plate discharge plate feeding device provided with a plate plate feeding guide means for guiding and conveying the plate to the plate, and a plate discharging plate feeding device for moving the plate discharging plate feeding device between the respective printing drums and the first position. With transportation means The features.

According to a second aspect of the present invention, in the multicolor printing apparatus according to the first aspect, each of the printing drums is provided with a holding means for holding the leading end portion of the plate-made master as a part of the printing drum. The holding means are arranged side by side in a substantially horizontal direction, and the holding means holds the front end of the plate-making master. The moving means is set to a position substantially above, and the moving means is a guide means for guiding the plate discharge plate feeding apparatus above the printing drums in the substantially horizontal direction, and the plate discharge plate via the guide means. The plate discharge apparatus has a driving unit and a stop position detecting unit that detects that the plate discharge apparatus is at a stop position where the plate discharge apparatus stops substantially right above each of the printing drums. , Plate feeding to each of the above printing drums For each operation, after moving to the first position to receive and hold the leading end of the plate-making master, it is stopped at each of the stop positions and the leading end of the plate-making master is passed to each of the holding means. It is characterized in that the masters that have been prepressed are fed to all the plurality of printing drums by repeating the above step.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the multicolor printing apparatus described above, the plate discharge plate feeding device is filled with a plate discharge storing means for storing a used master separated and discharged from each of the printing drums, and the plate discharge storing means is filled with a used master. The first position is a position closest to the plate making apparatus, and the plate discharge plate feeding apparatus has a first position and a first position. The plate discharge plate feeding device is movable to and from a second position where the plate discharge storing means can be detached and attached, and the plate discharge plate feeding device is moved to the second position based on a full detection signal from the full detection means. It is characterized by comprising a control means for controlling the moving means so as to automatically move to the first position.

According to a fourth aspect of the present invention, in the multicolor printing apparatus according to the third aspect, there is provided a notifying means for notifying that the plate discharge accommodating means is full of a used master. The means controls the informing means so as to inform that the plate discharge accommodating means is full with a used master, based on a full detection signal from the full detection means. As a concrete example of the control means in claim 3 or 4, a microcomputer, a control circuit, or the like can be used in addition to the microcomputer adopted in the embodiment of the invention described later. Specific examples of the notifying means in claim 4 are not limited to the guidance section and / or the auxiliary display section of the liquid crystal display section adopted in the embodiment of the invention described later, and may be displayed by a light emitting diode display device. Alternatively, buzzer may be used for buzzing / notifying, or these may be appropriately combined. It is preferable to dispose the notification means on the operation panel in order to easily recognize the notification.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the multicolor printing apparatus described above, the plate discharge plate feeding apparatus is the first
, The leading end of the master made by the plate making apparatus is guided and conveyed as it is to the holding means of the printing drum closest to the plate making apparatus via the plate feeding guide means. Is characterized by.

The invention according to claim 6 is the invention according to claims 2 to 5.
In the multicolor printing apparatus described in any one of the above, the plate feeding guide means includes a pair of plate feeding rollers that are rotatable in pressure contact with each other, and the holding means holds the leading end portion of the plate-made master. After holding, when each of the printing drums rotates to wind the master that has been prepressed, at least one of the plate feeding rollers stops rotating or rotates together, thereby imparting brake resistance to the master that is fed. It is characterized by doing.

The invention according to claim 7 is the invention according to claims 2 to 5.
In the multicolor printing apparatus described in any one of 1, the plate feeding guide means is stretched between a rotatable plate feeding roller and two rotatable plate feeding guide rollers, and is pressed against the plate feeding roller. A belt, and after each holding means holds the front end of the plate-made master, when each printing drum rotates to wind the plate-made master, the plate feeding roller and the belt It is characterized in that at least one of them stops rotating or rotates together to impart a brake resistance to the master to be fed.

According to an eighth aspect of the present invention, in the multicolor printing apparatus according to the seventh aspect, the plate feed roller, the belt, and the two plate feed guide rollers face the tip of a master which has been plate-formed substantially directly below. It is characterized in that they are arranged with a positional relationship of guiding.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention (hereinafter, referred to as "embodiments") including examples will be described below with reference to the drawings. Throughout the embodiments and the like, components (members or components) having the same function, shape, and the like will be denoted by the same reference numerals and will not be described once they have been described once. In order to simplify the explanation, the constituent elements that are configured as a pair in the figure and do not need to be particularly distinguished from each other will be replaced with the description by appropriately describing one of them. In order to simplify the drawings and the description, even if the constituent elements are to be shown in the drawing, the constituent elements that do not need to be particularly described in the drawing may be appropriately omitted without notice.

(Embodiment 1) With reference to FIGS. 1 and 2, the entire multicolor stencil printing machine in a first embodiment (hereinafter referred to as "embodiment 1") of the multicolor printing apparatus of the present invention. The configuration will be described. In FIG. 1, reference numeral 99 indicates a main body frame that forms the framework on the main body side of the stencil printing apparatus. The outer periphery of the main body frame 99 has a substantially housing shape. The multicolor stencil printing machine shown in FIG.
Four printing drums A, B, C, D (hereinafter referred to as “printing drums A to
Abbreviated as "D"), and four press rollers 25A, 25B, 25 as pressing means arranged near the lower portions of the respective printing drums A to D to press the fed printing paper P.
C, 25D (hereinafter, abbreviated as “press rollers 25A to 25D”), and a thermal head 5 as a plate-making means for plate-making the master 3 fixed to one side in the main body frame 99 and fed from the master roll 3a. Another plate making device 1 and a main body frame 99 facing the plate making device 1.
A first position P1 located between the printing drums A to D and closest to the plate making apparatus 1 on the other side of the inside, and the first position P1.
From the second position P2 where the plate discharge storage box 42 as the plate discharge storage means can be detached and attached, and is used on the plate cylinder 13 of each of the printing drums A to D (not shown). Plate discharging means 40 for separating the master of the plate and discharging the plate
Also, at the first position P1, a guide is provided to receive and hold a part of the master that has been prepressed, and to feed the plates to the printing drums A to D.
Plate feed guide portion 43 as plate feed guide means for transporting
And a moving means 38 for moving the plate discharge plate feeder 2 between the respective printing drums A to D and the first position P1 in detail as shown in FIG.

Further, the multicolor stencil printing apparatus shown in FIG. 1 is arranged below the plate making apparatus 1 and feeds the printing paper P stacked on the paper feeding table 14 to the respective printing drums A to D. Three
7 and the printing paper P fed from the paper feeding device 37 arranged near the lower portions of the printing drums A to D.
To D and each of the press rollers 25A to 25D, and a belt type sheet conveying device 21, and another side portion of the main body frame 99 near the downstream side of the sheet conveying device 21 for multicolor overprinting. A paper ejecting device 39 that conveys and ejects the printed printing paper P that has been printed to the paper ejection stack storage tray 28 serving as a paper ejection tray.
And.

In the multicolor stencil printing machine shown in FIG. 1, as will be described later, on the plate cylinder 13 of each printing drum A, B, C, D (hereinafter, simply "on printing drum A, B, C, D"). (Hereinafter abbreviated as "etc."), the printing paper P is sequentially pressed while supplying the ink to the master which has been prepressed, and multicolor overprinting can be performed.

Each of the printing drums A to D is rotatably supported around a drum shaft (not shown) arranged in the center and is driven by one main motor (not shown).
It is designed to be driven to rotate in the direction of the arrow (clockwise). The printing drums A to D have basically the same shape and size and the same configuration except for the ink color. That is, as shown in FIGS. 1 and 2, each of the printing drums A to D has the porous cylinder-shaped plate cylinder 1 provided on the outer peripheral portion thereof.
3, openable master clampers 59A to 59D that extend along one generatrix of the plate cylinder 13 and clamp the front end of the master 3 that has been prepressed by the prepress apparatus 1, and the insides of the printing drums A to D An ink roller 10 provided on the plate cylinder 13 for supplying ink to the inner peripheral surface of the plate cylinder 13 and a doctor for forming an ink reservoir 12 having a wedge-shaped cross section between the ink roller 10 and the ink roller 10 arranged in parallel with a minute gap. It has a roller 11 and an ink distributor (not shown) that supplies ink to the ink reservoir 12.

The rotary drive system equipped with the main motor is
The print drum rotation drive device 58 shown in FIG. As a rotary drive system for rotationally driving each of the print drums A to D, for example, Japanese Patent Application Laid-Open No.
A device similar to the up-and-down moving means shown in FIGS. 1 to 3, FIG. 14 and FIG. 15 of Japanese Patent Application Laid-Open No. 00-263906 is used.

The plate cylinder 13 is wound around an outer peripheral surface of a supporting cylinder made of metal, in which a large number of fine ink-permeable holes are formed, and an outer peripheral surface of the supporting cylinder. It has a two-layer structure with a porous elastic body layer (resin or metal mesh screen layer (not shown)) as a layer for diffusing and discharging ink by pressing. In addition,
The printing drum may be called a plate cylinder, but in the first embodiment and the like, the printing drums A to D and the plate cylinder 13 are distinguished from each other.

Master clamper 59 for each printing drum A-D
Each of A to 59D has a function / configuration as a holding unit that holds the leading end of the master 3 as a part of the master 3 that has been prepressed. The rotation position of the printing drum A corresponding to the master clamper 59A shown by the solid line in FIG. 1 represents the state of occupying the plate feeding position. Further, regarding the rotational positions of the print drums B, C, D corresponding to the master clampers 59B, 59C, 59D indicated by the two-dot chain line in the figure, the initial phase difference preset between the print drums A to D is ignored. Print drum B,
Note that the plate feeding positions that C and D will occupy are shown for reference, and it does not mean that the respective printing drums A to D occupy the plate feeding positions shown in FIG. 1 at the same time.
Regarding the initial phase difference preset between the print drums A to D, Japanese Patent Laid-Open Nos. 10-297074 and 11
-138961, JP-A-11-151852, JP-A-11-227309, or JP-A-11-208085 (Japanese Patent Application No. 10-167322).
No.) etc. That is, in each of the above technologies, in order to make the apparatus compact, the printing distance between adjacent printing drums (plate cylinders) is made shorter than the outer circumference of the printing drums of the printing drums, and the initial distance between the adjacent printing drums is reduced. It has a phase difference. The master clampers 59A to 59D are plate feed positions which are predetermined positions at which the respective print drums A to D are stopped by an opening / closing device provided on the main body frame 99 side around the respective print drums A to D and provided with a drive mechanism (not shown). It is opened and closed depending on the position and plate ejection position. In the supporting cylinder, an ink-passable printable area having the openings formed in a predetermined range on the circumference of the support cylinder, excluding the periphery of the master clamper 59, and ink not having the openings. An impermeable non-printing area is formed. The non-printing area is also provided on both side edge portions of the support cylinder.

The ink roller 10 rotates clockwise with the printing drums A to D by a gear train (not shown).
The doctor roller 11 rotates counterclockwise by a gear train (not shown). The ink roller 10 and the doctor roller 11 are rotatably supported by an ink side plate (not shown) fixed to the drum shaft. Here, the ink roller 10, the doctor roller 11, and the ink distributor constitute an ink supply device. The ink supply device has an ink container (in addition to the above-described components) that stores a specific type of ink ( An ink storage container pedestal (not shown) that detachably holds (not shown),
Ink reservoir 1 via the above ink distributor
2 and an ink pump (not shown) for sending ink to

Normally, the four print drums A to D have Y
(Yellow), M (magenta), C (cyan), Bk
Inks of four colors (black) are loaded in this order, and various colors are reproduced by the principle of dot image superposition. Of course, the character portion can be basically printed in a single color to avoid the positional shift of the printed image as much as possible.

In the four printing drums A to D, the rotational driving force is transmitted exactly without backlash by the above-mentioned rotational driving system and other known structures, and the deviation of the four color superposed printed images occurs. It is small, so that the problem of so-called offset ghost can be made to a level where it hardly causes a problem. Here, the “offset ghost” means, for example, that the ink of the print image formed on the surface of the printing paper P on the printing drum A is still undried and plate-making is completed on the downstream printing drum B adjacent to the printing drum A. Master of 3
The phenomenon in which the transferred undried ink is re-transferred after being visibly shifted to the next printing paper P (or printed matter) to be fed. Offset Ghost "
Is not limited to the print drum B on the downstream side, but can occur without exception on the print drum A on the most upstream side.

The diameters of the printing drum A and the printing drum B are the same as described above, and the printing drum A is printed on the printing paper P.
Even if the ink transferred from the transfer to the plate-made master 3 on the printing drum B and transferred again to the next printed material surface,
By making the next re-transferred image on the surface of the printed matter overlap the same portion as the image on the printing drum A, ink stains are prevented. This relationship is related to the print drum B
The same applies to the print drum C and the print drum C and the print drum D.

Each of the printing drums A to D constitutes a drum unit together with the ink supply device, the above-mentioned components and the like, and is detachably attached to the main body frame 99 via an attaching / detaching means (not shown). The attaching / detaching means has the same structure as the plate cylinder supporting device shown in FIGS. 1 to 4 of Japanese Utility Model Laid-Open No. 61-85462.

The press rollers 25A to 25D are arranged in the vicinity of the lower part of the plate cylinder 13 facing the ink rollers 10 of the printing drums A to D, and the printing is performed via a rotation transmission means and a cam which are not shown. Contact / separation between a pressing position for moving up and down at a predetermined timing according to the rotation of the drums A to D to press the outer peripheral surface of the plate cylinder 13 of each printing drum A to a non-pressing position separated from the pressing position. It is configured to be freely displaceable. Each press roller 25A to 25D has the same shape and the same contact / separation displacement means. As the contact / separation displacement means, for example, the one shown in FIGS. 1 and 18 of the above-mentioned JP 2000-263906 A is used.

Master clamper 59 for each printing drum A to D
As shown in FIG. 2, each master clamper 59 is located at an upper right portion of each of the printing drums A to D at a diagonally right position as shown in FIG. It is set in advance at the upper position.

The paper feeding device 37 separates the paper feeding tray 14 on which the printing papers P are stacked and which can be raised and lowered, and the paper feeding roller 15 which comes into contact with the uppermost printing paper P on the paper feeding tray 14 and sends it out. Separation rollers 16 for separating the printing paper P one by one by the cooperative action with the pad 17, paper feed rollers 15 and separation rollers 1
Printing paper P separated by 1 and sent out by 6
To the registration roller pair 19 on the downstream side, and a resist for sending the leading edge of the printing paper P carried by the carrying roller pair 18 to the paper leading edge clamper 20a of the paper feeding device 21 at the same timing. And a roller pair 19.

The paper feed tray 14 is moved up and down by a motor device (not shown) in association with increase and decrease of the printing paper P. The paper feed roller 15 and the separation roller 16 are connected to each other via a pulley, a timing belt, and the like (not shown), and a paper feed motor (not shown) arranged independently of the rotational driving force of the main motor is used. Is rotated counterclockwise at.
As the paper feeding motor, for example, a stepping motor is preferably used. Each axis of the paper feed roller 15 and the separation roller 16 has
One-way clutches (not shown) are incorporated, respectively, and are rotated only counterclockwise by a paper feed motor or driven by the conveyance force of the printing paper P.

The conveying roller pair 18 is connected to the paper feeding motor through a rotation transmitting means such as a gear or pulley (not shown) and a timing belt (not shown), and is rotated in pressure contact with each other. The registration roller pair 19 is connected to a registration motor (not shown) via a pulley and a timing belt (not shown), and is rotated in pressure contact with each other by the registration motor. As the registration motor, for example, a stepping motor is preferably used.

As shown in FIGS. 1 and 3, a plurality of sheet conveying devices 21 are provided as holding means for receiving and holding the leading end portion of the printing paper P fed from the paper feeding device 37 (3 in this embodiment 1). Two) paper leading edge clampers 20a, 20
b, 20c and the paper transport direction X1 on the print drum D
Driven pulleys 24, 24 as a pair of toothed pulleys located on the downstream side (left side of the apparatus) and driven as a pair of toothed pulleys located on the upstream side (right side of the apparatus) in the paper transport direction X1 of the print drum A. The pulleys 23, 23 and the three paper leading edge clampers 20a, 20b, 20c are provided at a predetermined interval, and are stretched between the drive pulleys 24, 24 and the driven pulleys 23, 23. A pair of timing belts 22 that are rotatable in the direction of the arrow
a, 22b and the paper leading edge clampers 20a, 20b, 2
0c is driven to release the cam.

The drive pulleys 24, 24 are shown in FIGS.
Is connected to an electric motor through a rotational driving force transmission means such as a gear (not shown) fixed to the rotating shaft 152 shown in FIG. 6 or a toothed pulley (not shown) and a toothed belt (not shown). There is. Paper edge clampers 20a, 20b, 2
0c conveys the print paper P to the downstream side in the paper conveyance direction X1 while nipping the leading end thereof, and releases (opens) it for the next process.
It has an openable and closable structure. Timing belt 2
2a and 22b are three paper leading edge clampers 20a and 20b.
b, 20c is fixed to a base member side, which will be described later, and has a function and a configuration for carrying the print paper P sandwiched between the paper leading edge clampers 20a, 20b, 20c by controlling the speeds, timings, etc. of the print drums A to D. Have.

As shown in FIGS. 1 and 3, the drive pulleys 24, 24, the driven pulleys 23, 23, the timing belts 22a, 22b and the three paper leading edge clampers 20a,
Since 20b and 20c are arranged in the same shape and in the same phase on the front side and the back side of the paper surface in FIG. 1, one description may be omitted hereinafter.

As shown in FIG. 3, a pair of drive pulleys 2
4, 24 are fixed to a rotary shaft 152 arranged in parallel with the drum axis Aa of the printing drum A so that their tooth forms coincide with each other in the rotary shaft direction of the press roller 25A. Similarly, the pair of driven pulleys 23, 23 are also toothed on the rotary shaft 154 arranged parallel to the drum axis Aa of the print drum A in the rotation direction of the print drum A shown by the chain double-dashed line in FIG. Are fixed to match. The same applies to the printing drums B to D (the printing drum A will be described below as a representative). This allows
The tooth belts of the timing belts 22a and 22b are also in phase with each other, and are parallel to the drum axis Aa of the printing drum A when fixing the paper leading edge clampers 20a, 20b and 20c to the base member side, which will be described later, to the timing belts 22a and 22b. It is easy to fix to.

The drive pulley 24 is rotationally driven in the counterclockwise direction by the electric motor via the rotational drive force transmission means, and the side closer to the printing drum A is the tension side of the timing belts 22a and 22b. . The timing belts 22a and 22b are stretched between the drive pulley 24 and the driven pulley 23 so that the timing belts 22a and 22b are substantially orthogonal to the drum axis Aa and the traveling directions are substantially parallel to each other. Paper edge clampers 20a, 20b, 2
The base member side of 0c which will be described later is provided with the rotary shafts 152, 15
Both end portions are fixed to the timing belts 22a and 22b on both sides in a bridging manner so as to be substantially parallel to 4. In addition, in FIG. 3, the shape of the paper leading edge clamper 20 a is shown in a simplified manner, and the paper leading edge clamper 20 having three paper leading edge clampers 20 a is shown.
Two of a, 20b, and 20c are omitted in the drawing.

More specifically, the paper leading edge clampers 20a, 20b, 20c are arranged such that, when the printing paper P is nipped, the printing paper P is conveyed in the pressing posture of the press rollers 25A-2.
It is fixed to the pair of timing belts 22a and 22b along the substantially tangential direction of 5D. The width W between the insides of the pair of timing belts 22a and 22b is X in the paper transport direction.
It is set to be larger than the maximum width of the printing paper P orthogonal to 1. That is, the pair of timing belts 22a, 22
The width W between the inner sides of b is set to be larger than the maximum width of the printing paper P that can be printed by the above-mentioned multicolor stencil printing apparatus, and thus the width of the paper leading edge clampers 20a, 20b, 20c is set to the width of the printing paper P. It can be taken larger than.

Both ends of the rotary shaft 152 of the drive pulley 24 are supported by bearings 151, and the bearings 151
Is fixed to a side plate 100 fixed to the body frame 99 side. Reference numeral 100a indicates a fitting hole of the bearing 151. Both ends of the rotary shaft 154 of the driven pulley 23 are similarly supported by the bearings 153.
Are fixed to the adjusting plate 104 located on the back side of the side plate 100. Both ends of the rotary shaft 154 are inserted into elongated holes 100b formed in the side plate 100 and extending in the paper transport direction X1. The adjusting plate 104 is biased in a direction opposite to the sheet transport direction X1 by a biasing means (not shown). That is, the adjusting plate 104 is provided so as to be movable in a direction substantially perpendicular to the drum axis Aa of the press rollers 25A to 25D. Thereby, the timing belts 22a, 22
Moderate tension is added to b. Reference numeral 104
Reference character a denotes a fitting hole into which the bearing 153 is movably fitted in the paper transport direction X1.

As shown in FIG. 4, the timing belt 22
When the pitch of the teeth 22c of the a and 22b is PX and the number of pitches is n, the pitch circumferential length (peripheral length) nPX of the timing belts 22a and 22b is an integral multiple of the outer circumferential length L of each of the printing drums A to D. And the number of pitches n is the drive pulley 24
It is set to be an integral multiple of the total number z of teeth. Specifically, it is set so that the relation of the following equation is established. 4L = nPX, n = αz (α is an integer value) By this relationship, the peripheral speed of each of the print drums A to D and the transport speed of the timing belts 22a and 22b (moving speed of the paper leading edge clampers 20a, 20b, and 20c) are determined. This facilitates synchronization, and the rotation cycle of each of the print drums A to D and the movement cycle of the paper leading edge clampers 20a, 20b, 20c can be accurately synchronized.

Further, the interval pitch size of the paper leading edge clampers 20a, 20b, 20c in the circumference of the paper transporting device 21 is equal to the outer circumference of each of the printing drums A to D, and the belt type discharge and stack described later. It is set to be equal to the interval pitch dimension of the paper leading edge clamper 26 in the peripheral length of the paper transporting device 27.

Paper leading edge clampers 20a, 20b, 20c
As shown in FIG. 5, the belt mounting portion 17 forming both ends is
0 and 170 are integrally formed, and a lower claw 160 as a base member capable of contacting one surface of the printing paper P and a lower claw 16
0 has an upper claw 161 as a sandwiching member configured to be openable and closable with respect to 0 and capable of contacting the other surface of the printing paper P. The paper P is pinched.

At both ends of the upper claw 161, a substantially tongue-shaped lever 162 as a lever-shaped member is integrally formed.
In FIG. 5, the support shaft hole 16 is provided at the upper end of the lever 162.
3, holes 164 are formed through the lower end of the lever 162, respectively. On the other hand, a support shaft hole 169 is formed through both ends of the lower claw 160, and
The belt mounting portions 170, 170 described above are integrally formed, and the timing belts 22 a, 2 are mounted via screws 171.
It is fastened and fixed on 2b. Below, paper edge clamper 2
The configurations of 0a, 20b, and 20c are the same on the right front side and the left back side (omitted in FIG. 5) of FIG.
The right front side of will be described.

Support shaft hole 163 of upper claw 161 and lower claw 160
After a support shaft 165 around which a spring 166 (torsion coil spring) for urging the upper pawl 161 is always closed with respect to the lower pawl 160 is loosely fitted in the support shaft hole 169 of the lower pawl 160, a retaining ring (not shown) is shown. Is mounted, the movement in the axial direction is restricted, and the support shaft 165 serves as the support shaft hole 1 of the lower claw 160.
It is fixed to 69. One end 166 a of the spring 166 is bent at a substantially right angle and is locked to the upper claw 161 side, and the other end 166 a.
b is bent at a substantially right angle and is locked to the lower claw 160 side. Accordingly, the holding portion 161a on the free end side of the upper claw 161 is swingably supported by the lower claw 160 via the support shaft 165, and is always closed by the urging force of the spring 166 unless an external force acts. . The biasing force of the spring 166 is
It is set so that no nipping marks are left on the printing paper P and the posture does not shift during the transportation of the printing paper P.

The upper claw 161 and the lower claw 160 are not limited to the shapes shown in the drawings, but the holding part 161a may be formed in a comb-tooth shape or the biasing force of the spring 166 may be adjusted to save material. In order to do so, a combination of a ferromagnetic material (lower claw 160) and a rubber magnet (upper claw) that attracts this with magnetic force may be used.

The shaft 167 is fitted and fixed in the hole 164 of the upper claw 161. After this, a cam follower 168 with a rollable roller is attached to the outside of the shaft 167 as a contact portion that selectively contacts the cam. The cam follower 168 includes, for example, a roller bearing. The cams are provided on the side plate 100 side near the driven pulley 23 and on the side plate 100 side near the drive pulley 24, respectively.

The paper discharging device 39 is mainly composed of the above-mentioned paper discharging and accommodating tray 28 and the belt type discharging and accumulating paper conveying device 27. The discharge stacking sheet transport device 27
As shown in FIG. 1, it is provided on the drive pulley 24 and above the discharged paper stack storage tray 28. The ejected and stacked paper sheet conveying device 27 holds and conveys the printed printing paper sheet P printed by each of the printing drums A to D.
It has a function and a configuration to receive the printed printing paper P from the paper leading edge clampers 20a, 20b, 20c, convey it to the paper ejection stack storage tray 28, and discharge and stack it.

That is, the discharged and stacked paper sheet conveying device 27 is
A discharge stacking paper leading edge clamper 26 as a holding means for receiving and holding the printed printing paper P from the paper leading edge clampers 20a, 20b, 20c of the paper transporting device 21 that holds and transports the printed printing paper P, and a drive. Pulley 24
Driven as driven pulleys 30, 30 as a pair of toothed pulleys located upstream in the paper transport direction X1 and as a pair of toothed pulleys located downstream of the driven pulleys 30, 30 in the paper transport direction X1. Pulleys 31, 31
And a pair of timing belts 29a and 29b which have a discharge and stack paper leading edge clamper 26 and are stretched between the driven pulleys 30 and 30 and the drive pulleys 31 and 31 and are rotatable in the direction of the arrow in FIG. It has a cam (not shown) that drives to release the stacked paper leading edge clamper 26.

The drive pulleys 31, 31 are shown in FIGS.
Compared with the drive pulleys 23, 23 shown in FIG. 3, only the diameter thereof is slightly different, and the other configurations are the same. The driven pulleys 30 and 30 are the same as the driven pulleys 24 and 24 shown in FIGS. 1 and 3 except that the driven pulleys 24 and 24 have a slightly smaller diameter. The drive pulleys 31, 31 are gears (not shown) or toothed pulleys (not shown) and toothed belts that are fixedly mounted on a rotary shaft (not shown) that fixes the drive pulleys 31, 31 at both ends. It is connected to an electric motor via a rotational driving force transmission means (not shown) or the like. The discharged stacked paper leading edge clamper 26 has an openable and closable structure that holds the leading edge of the printed printing paper P while carrying it to the downstream side in the paper transport direction X1 and releases it for the next step. The discharged and stacked paper leading edge clamper 26 has the same shape and configuration as the paper leading edge clampers 20a, 20b, 20c shown in FIG. 5, for example. The timing belts 29a and 29b differ from the timing belts 22a and 22b shown in FIGS. 1 and 3 only in that their circumferences are short, and other configurations are the same. The timing belts 29a and 29b fix the base member side of the discharged and stacked paper leading edge clamper 26,
It has a function / structure for carrying the printing paper P sandwiched by the ejected and stacked paper leading edge clamper 26 by controlling the speed, timing and the like with the timing belts 22a and 22b of the paper transporting device 21. An upper cover 33 as a safety cover for ensuring safety during operation of the discharged and stacked sheet transporting device 27 is provided near the upper portion of the discharged and stacked sheet transporting device 27. The upper cover 33 is openable and closable around the hinge portion 33a.

In FIG. 1 and FIG. 2, reference numeral 1A indicates a frame forming a frame of the plate making apparatus 1. The outer periphery of the frame 1A has a substantially housing shape. On the front side and the back side of FIG. 1, plate-making side plate pairs (not shown) fixed to the frame 1A are provided. The plate making apparatus 1 is fed from a roll supporting member 3c provided on the plate making side plate pair and detachably supporting the master roll 3a, and a thermal head driving device 6 including a thermal head driving circuit shown in FIG. A thermal head 5 for plate-making the master 3 fed from the master roll 3a based on a digital image signal.
A platen roller 4 which rotates while being pressed against the thermal head 5 via the master 3, and a pair of upper and lower tensions for sending the plate-made master 3 conveyed by the platen roller 4 to the master discharge roller pair 7a, 7b. Rollers 9a, 9b, a rotary cutter 8 as a cutting means for cutting the master 3 to a predetermined length, and a guide frame 34, and a pair of upper and lower master discharge rollers arranged on the downstream side of the cutting means in the master conveyance path. 7a, 7b
And the rotary cutter 8 and the master discharge roller pair 7a, 7b
And a master storage means provided with a bending box 62, a suction fan 61, and the like disposed above the guide frame 34 between and.

The master roll 3a has a form in which a long sheet-shaped master 3 for 200 to 250 plates is wound around the outer periphery of a pipe-shaped core tube 3b. Master 3
Is a well-known one in which a support made of Japanese paper or synthetic fiber is attached to a thermoplastic resin film (hereinafter referred to as “film”) such as polyester having a thickness of 1 to 3 μm. As the master 3, a master or the like which is substantially composed of a thermoplastic resin film is also used. The master 3 is supported by the roll support member 3c so as to be able to be fed out from the master roll 3a in the master transport direction. The master roll 3a is supplied to the stencil printing machine and used as a supply. The roll supporting member 3c is provided so as to rotatably support both ends of the core tube 3b. The roll supporting member 3c is provided so that a braking means (not shown) such as a rubber ball is brought into contact therewith. As a result, the master 3 is provided with a braking force that is not naturally paid out by vibration or the like from the master roll 3a mounted and set on the roll support member 3c.

The thermal head 5 has a plurality of heating elements arranged along the main scanning direction corresponding to the axial direction of the platen roller 4, and selectively energizes the heating elements based on the digital image signal. It has a well-known function of selectively heating the heating element by control to heat and melt the film portion of the master 3 corresponding to the heating position to perforate. The thermal head 5 is provided so that it can be brought into contact with and separated from the platen roller 4 by a contacting / separating means (not shown).

The platen roller 4 is integrally formed on the outer peripheral portion of the roller shaft, and is rotatably supported by the plate making side plate pair via the roller shaft. The platen roller 4 includes a pulley (not shown) arranged on the roller shaft,
It is rotated by a plotter motor 35 connected via a drive pulley provided on the side of a plotter motor 35 described later and a timing belt (neither is shown in the drawing) stretched between these pulleys and the drive pulley. It has a function as a master transfer means for pressing the thermal head 3 to the master storage means on the downstream side in the master transfer direction. The plotter motor 35 is a stepping motor.

The tension roller pair 9a, 9b has a function / structure for applying a predetermined front tension (tension) to the master 3 which has been plate-formed from the nip portion between the thermal head 5 and the platen roller 4 to the tension roller pair 9a, 9b. Have. The tension roller pair 9a, 9b is configured such that the upper roller is a driving roller and the lower roller is a driven roller, and the upper driving roller is a rotation transmitting means such as a pulley and a timing belt (neither is shown). Is connected to the plotter motor 35 via. Therefore, the pair of tension rollers 9a and 9b also have a function as the master conveying means.

The rotary cutter 8 is driven by a cutter motor (not shown). The guide rail 34 also functions as a guide plate that conveys and guides the master 15 that has not been plate-made or has been plate-made. When the rotary cutter 8 is not in operation, the rotary cutter 8 stands by at one end of the master conveyance path so as not to hinder the conveyance of the master 3, and this is the home position of the rotary cutter 8. The cutting means is not limited to the above-mentioned one, and has a movable upper blade and a fixed lower blade, for example, as disclosed in Japanese Patent Publication No. 7-84086, and the movable upper blade is a fixed lower blade. On the other hand, as the master 3 moves in the width direction while rotating, as disclosed in Japanese Utility Model Publication No. 3-40556, it has only a movable upper blade and this moves while rotating with respect to the master 3. Of composition,
Alternatively, it may be a so-called guillotine type having movable movable blades and fixed blades.

The flexure box 62 is used for the master 3 which has been prepressed.
It has a function of storing while forming a bend. A suction fan 61 having slits, a mesh-shaped suction port and an exhaust port (both not shown) and having an electric motor built therein is arranged on the inner side of the bending box 62. Due to the rotation of the suction fan 61, an air flow that flows from the left side to the right side in FIG.

In the master discharge roller pair 7a, 7b, the upper roller is a driving roller and the lower roller is a driven roller. Master discharge roller pair 7a, 7
The plate b has a function of transferring the plate-making master 3 stored in the bending box 62 to the plate feeding guide portion 43 of the plate discharging plate feeding apparatus 2. An electromagnetic clutch 36 as a rotational drive force connecting / disconnecting means is interposed between the shaft of the upper master discharge roller 7a and a pulley (not shown) fixedly mounted on this shaft.
The upper master discharge roller 7a is connected to the plotter motor 35 via the rotation transmission means such as the pulley, the electromagnetic clutch 36, and the timing belt (not shown). The master conveyance speed by the pair of master discharge rollers 7a and 7b is set in advance so as to be slightly higher than the master conveyance speed by the platen roller 4.

In FIG. 1 and FIG. 2, reference numeral 2A indicates a frame forming a framework of the plate discharge plate feeding apparatus 2.
The outer periphery of the frame 2A has a substantially housing shape. The plate discharge plate feeding apparatus 2 is unitized with the frame 2A. As shown in detail in FIG. 2, the plate discharge plate feeder 2 includes the plate feed guide portion 43 described above and the plate discharge unit 4 described above.
0, the above-described plate discharge storage box 42 that compresses and stores the used master 3 that has been separated and discharged and discharged by the plate discharge unit 40, and a drive motor 49 as a drive unit that constitutes a part of the moving unit 38. It has. Hereinafter, the configuration around the plate supply guide portion 43, the plate discharge means 40, the plate discharge storage box 42, and the moving means 38 will be described in detail.

The plate feed guide section 43 receives and holds the leading end of the plate-finished master 3 sent out by the pair of master discharge rollers 7a and 7b of the plate-making apparatus 1 at the first position P1 and holds the print drums A to D. A pair of upper and lower plate feeding rollers 44a and 44b for transporting to the plate, and a plate feeding roller 44a connected to the shaft of the upper plate feeding roller 44a through a rotation transmitting means such as a gear or pulley and a timing belt.
A plate feed motor 41 as a driving means for rotating the plate and a tip 3d of the plate-made master 3 conveyed by the plate feed roller pairs 44a and 44b are directed to the expanded master clamper 59 of each printing drum A to D. It is mainly composed of guide plates 45a and 45b as guide members for guiding the guide. The plate feeding motor 41 is composed of a stepping motor as a driving means for inputting with a pulse.

The plate discharging means 40 is rotatable in pressure contact with each other in the direction of the arrow in FIG. 2, and is in contact with the used master 3 on each of the printing drums A to D to separate and convey it. A pair of plate discharging and peeling roller 69 and plate discharging roller 70 which are swingable and displaceable between the peeling position and a non-peeling position, and the plate discharging and peeling roller 69 via a rotation transmission means such as a gear or a pulley and a timing belt. A plate discharge motor 60, which is connected to drive the plate discharge peeling roller 69 to rotate, and a plurality of rubber belts 75 are provided above the plate discharge peeling roller 69 so as to be movable in a substantially vertical direction.
2 through which the plate discharge conveyance roller 7 is rotatable in the direction of the arrow in FIG.
4 and a plate discharge conveyance roller 76 which is provided above the plate discharge roller 70 so as to be movable in a substantially vertical direction and is rotatable in the direction of the arrow in FIG. The plate discharge conveyance roller 78, which is provided so as to be movable in the vertical direction and is rotatable in the direction of the arrow in FIG. -Mainly composed of a displacing means which will be described later.

The plate discharge peeling roller 69 has a shaft 69a and is integral therewith, the plate discharge roller 70 is a shaft 70a and is integral therewith, and the plate discharge conveying roller 74 is a shaft 74a and is integral therewith. The plate discharge transport roller 76 has a shaft 76a and is integral therewith, and the plate discharge transport roller 78 is a shaft 78a.
Is formed integrally with this. The plate discharge peeling roller 69, the plate discharge roller 70, the plate discharge conveyance roller 74, the plate discharge conveyance roller 76, and the plate discharge conveyance roller 78 are formed by dividing the shafts 69a, 70a, 74a, 76a, 78a into a plurality of dumpling skewers. ing. Both ends of the shaft 69a of the plate discharge peeling roller 69, the shaft 70 of the plate discharge roller 70
The both ends of a are the both ends of the shaft 74a of the plate discharge transport roller 74, the both ends of the shaft 76a of the plate discharge transport roller 76, and the both ends of the shaft 78a of the plate discharge transport roller 78 are the front side and the back side of the paper surface of FIG. A pair of arm side plates 72, 7 disposed on the
2 are rotatably supported by bearings (not shown). The arm side plate pair 72, 72 is formed with a guide groove (not shown) that is long in a substantially vertical direction, and the plate discharge plate feeding apparatus 2
A plurality of pins fixedly mounted on the frame 2A are loosely fitted into the guide grooves, so that the pair of arm side plates 7
Reference numerals 2 and 72 are capable of oscillating displacement / elevation in a substantially vertical direction (strictly speaking, a direction along a trajectory of oscillating displacement about the central support shaft 71). In addition, in FIG. 2, the upper right side of the arm side plate pair 72, 72 is shown in a broken manner (the same applies to FIG. 8 described later).

As described above, the arm side plate pair 72, 7
2, plate discharge peeling roller 69, plate discharge roller 70, several rubber belts 75, plate discharge conveyance rollers 74, several rubber belts 7.
7, the plate discharge transport roller 76, several rubber belts 79, and the plate discharge transport roller 78 constitute a plate discharge peeling unit 68 which is swingable and displaceable in a substantially vertical direction about a central support shaft 71.

The displacement means is mainly composed of a central support shaft 71, arm side plate pairs 72, 72, a solenoid 73 and a spring (not shown) as a biasing means. Central support shaft 7
Both ends of 1 are fixed to the arm side plate pair 72, 72. Both ends of the center support shaft 71 outside the center support shaft 71 fixing portion of the pair of arm side plates 72, 72 are rotatably provided on the frame 2A of the plate discharge plate feeder 2. In the vicinity of the left end of the arm side plate 72 on the far side in FIG.
A solenoid 73 having 3a is fixed to the frame 2A. A plunger 73a of a solenoid 73 is connected to a left end portion of the arm side plate 72 on the far side in FIG. 2 via a pin. The spring is a pair of arm side plates 72, 72.
Is a pair of tension springs provided between the upper end (not shown) and the upper part of the frame 2A of the plate discharge plate feeder 2.
The spring urges the plate discharging and peeling unit 68 to be displaced in a substantially upward direction, that is, the plate discharging and peeling roller 69 and the plate discharging roller 70 are always displaced to the non-peeling position.

Inside the plate discharge storage box 42, a compression plate 82 for compressing the used master 3 (not shown) stored in the plate discharge storage box 42 is provided so as to be movable up and down. On the upper part of the compression plate 82, a rack portion 82b having a rack shown by being partially broken is integrally formed. Near the lower end of the rack portion 82b, an elevating motor 81 as a drive means for elevating and driving the compression plate 82 is fixedly installed on the frame 2A. A pinion 84 that is constantly meshed with the rack of the rack portion 82b is fixed to the output shaft of the lifting motor 81. At the upper end of the rack portion 82b, the protruding piece 82
a is formed to project.

On the other hand, on the frame 2A near the upper end of the plate discharge storage box 42, a full detection sensor 83 which is selectively brought into contact with the protruding piece 82a is fixedly installed. Full detection sensor 8
Reference numeral 3 denotes, for example, a micro switch, which is a plate discharge plate stored in the plate discharge storage box 42 (used master 3
(Not shown)) has a function / configuration as a full-state detecting unit for detecting that the state is full.

When the discharged stencil storage box 42 is not full, the lifting motor 81 is turned on and driven in the normal direction, so that the rack portion 82b and the compression plate 8 at the top dead center position.
2 descends inside the plate discharge storage box 42, and the projection piece 82a
Pushes the contact of the full detection sensor 83 to detect the bottom dead center (the full detection sensor 83 is turned on), and then the lifting motor 81
Is driven in the reverse direction, the compression plate 82 returns to the original top dead center position. When the plate discharge storage box 42 is full of plate discharge, the lift motor 81 is driven in the normal direction and the full detection sensor 83 does not turn on even after a predetermined time, whereby full detection is performed.

As shown in FIGS. 1 and 2, on the upper left side of the plate discharge storage box 42, a handle 42a for detachably attaching the plate discharge storage box 42 to the main body frame 99 is integrally formed. As shown only in FIG. 1, on the upper left side of the main body frame 99, a plate discharge cover 80, which is a part of the exterior cover and is openable and closable around a hinge portion 80a, is provided. When the plate discharge storage box 42 is attached to or detached from the main body frame 99, the operator may open the plate discharge cover 80 and pull out the plate discharge storage box 42 in the left direction Xa or remove it, or insert it in the right direction Xb to mount it. it can.

As shown in FIGS. 1 and 2, the moving means 38 is a guide rail 46 as a guide means for guiding the plate discharge plate feeding apparatus 2 in a substantially horizontal direction above the printing drums A to D, The plate discharge plate feeding device 2 is shown in FIG.
Drive means to be described later for reciprocating in the left-right direction X, and four stop positions as stop position detecting means for detecting that the plate discharge plate feeding device 2 is at a stop position substantially above each of the printing drums A to D. It has position sensors 56A to 56D.

The guide rail 46 is fixed to the main body frame 99 on the front side and the rear side of the paper surface of FIG. 1 so as to sandwich the plate discharge plate feeding apparatus 2, and extends in the left-right direction X of FIG. It consists of members. Figure 1 in frame 2A
On the front side and the back side of the paper surface, a convex member as a guided member that is loosely fitted in the concave member is integrally formed. The drive means includes a rack rail 47 fixed to the main body frame 99 side and having a rack parallel to the guide rail 46, and a pinion 48 fixed to the inner side of the frame 2A and constantly meshed with the rack. It is mainly composed of a drive motor 49 fixed to the shaft and capable of rotating in the forward and reverse directions shown by a chain double-dashed line. As the drive motor 49, for example, a DC motor or a stepping motor is used. The drive means is not limited to the one described above, but the plate discharge plate feeder 2 may be moved via a chain or a toothed belt to which a winding transmission device is applied, for example. Further, in the example of the driving means, a worm gear may be interposed between the pinion 48 and the output shaft.

When the drive motor 49 on the frame 2A side is driven, the pinion 48 of the rack rail 47 engaging with the rack is rotated, so that the plate discharge plate feeder 2 moves along the rack rail 47 and the guide rail 46 as shown in FIG. Move in the left-right direction X of.

The four stop position sensors 56A to 56D are
The stop position of the plate discharge plate feeder 2 is detected by selectively engaging the light shielding plate 57 integrally formed with the frame 2A on the right side of the plate discharge plate feeder 2 and projecting the light path thereof. The transmission type optical sensor includes a light emitting element and a light receiving element. The four stop position sensors 56A-56D are
In FIG. 7, the plate discharge plate feeding device position detection device 56 is generically represented. The stop position detecting means is not limited to the one described above, and for example, a micro switch or a reflection type optical sensor may be used.

In FIG. 1, as shown in FIG. 2, the plate discharge plate feeding apparatus 2 moves to the right Xb and is closest to the plate making apparatus 1 at a first position P1 (which is also the home position of the plate discharging plate feeding apparatus 2). That is, in order to stop at a position substantially directly above the printing drum A and receive and hold the leading end 3d of the plate-finished master 3 from the plate-making apparatus 1, the frame 2A
The drive motor 49 may be controlled so that the plate discharge device 2 stops at a position where the light shielding plate 57 of FIG. 2 blocks only the optical path of the stop position sensor 56A. Similarly, as shown in FIG.
In order to stop at the second position P2 where the plate discharge storage box 42 can be detached most from the position P1 of FIG. The drive motor 49 may be controlled so that the device 2 stops.

In addition, the used master 3 on the print drum B, which is located just above the print drum B, is ejected, and the master clamper 59B on the print drum B ejects the master from the plate making apparatus 1 to the master. In order to stop the leading end 3d of the plate 3 at the plate feed stop position of the printing drum B for plate-pressing and plate-feeding, the plate discharge plate feeder 2 is set at a position where the light shielding plate 57 of the frame 2A blocks only the optical path of the stop position sensor 56B. The drive motor 49 may be controlled to stop. Similarly, the printing drum C
The used master 3 on the printing drum C at a position substantially directly above is discharged, and the tip 3d of the master 3 finished by the plate making apparatus 1 is mounted on the master clamper 59C on the printing drum C. In order to stop at the plate supply stop position of the printing drum C for plate supply, the drive motor 49 is so arranged that the plate discharge plate supply apparatus 2 stops at a position where the light shielding plate 57 of the frame 2A shields only the optical path of the stop position sensor 56C. You can control it.

In FIG. 1, a document reading device (not shown) for reading an image on the surface of a document (not shown) is arranged above the main body frame 99. This document reading device has a color separation function shown in FIG. 7 for reading an image of a document having a color separation function, and an openable / closable pressure plate (not shown) arranged on the upper surface of the color separation scanner 50. And an ADF (automatic document feeder) (not shown) for automatically and sequentially feeding a plurality of documents (not shown). The color separation scanner 50 includes an image sensor (not shown) such as a CCD that photoelectrically converts the optical information of the read document. The image signal photoelectrically converted by the image sensor is passed through an analog / digital (A / D) conversion section (not shown) provided in the multicolor stencil printing apparatus, and the interface controller 52 shown in FIG.
(It is abbreviated as “I / F controller 52” in FIG. 7). As the color separation scanner 50 for a personal computer or the like, a known light source color separation system or color sensor system is preferably adopted from the viewpoint of the current cost.

The operation panel 90 will be described with reference to FIG. The operation panel 90 is used to give instructions to each device of the multicolor stencil printing device to perform a desired operation, and is arranged on one side of the upper part of the document reading device. . On the operation panel 90, as shown in FIG.
As a plate-making start setting means for activating a series of processes (operations) from reading an image of an original document to plate discharge, plate making, plate feeding, plate printing, and paper discharge process, that is, for starting plate making operation A plate making start key 91, a ten key 93 for inputting / setting the number of prints, etc., and a print start key 92 for starting a printing operation for the number of prints set (input / set) by the ten key 93. And a message such as a state of an operation to be performed by an operator, a warning, or a selected function, a jam location of the master 3 or the printing paper P, a stop position state of the plate discharge plate feeder 2, or a plate discharge storage box. A liquid crystal display unit 95 and the like for appropriately displaying and notifying the full discharge state of 42 and the like are arranged.

The liquid crystal display unit 95 is composed of an LCD (liquid crystal display device) and is driven by a liquid crystal drive circuit (not shown). The liquid crystal display unit 95 notifies the operator of the operation to be performed, gives a warning to the operation result, jams the master 3 and the printing paper P, the stop position state of the plate discharge plate feeder 2, or the plate discharge storage box 42. Guidance section 95 for displaying appropriate characters such as the full discharge state of the
A and the operation contents which are displayed by the guidance section 95A in the form of characters are sequentially shown in the figure, the jam location of the master 3 and the printing paper P, the stop position state of the plate discharge plate feeder 2, the discharged plate full state of the plate discharge storage box 42, etc. And an auxiliary display portion 95B for specifically displaying a picture. The guidance section 95A and the auxiliary display section 95B have a function and a configuration as a notifying means for notifying that the plate discharge storage box 42 is full of the used master 3.

Next, referring to FIG. 7, a control configuration around the multicolor stencil printing apparatus will be described. The control block diagram shown in FIG. 7 shows a main control configuration around the multicolor stencil printing apparatus. Therefore, the control components such as the paper feeding motor and the registration motor of the paper feeding device 37, the electric motors of the paper transporting device 21 and the electric motors of the discharged and stacked paper transporting device 27 are omitted. However, these are also control devices 55 (hereinafter referred to as “control device 5” of the multicolor stencil printing device.
5 "). Figure 7
In parentheses, reference numerals (200) and (2
Note that 41) is not the control component of the first embodiment but that of the second embodiment described later.

As shown in FIG. 7, a manuscript image read by the color separation scanner 50 and a color manuscript image created on the personal computer 51 (hereinafter abbreviated as “personal computer 51”) are displayed on the personal computer 51. Then, the image data is output as the separated four image data after being optimally edited and corrected, and is taken into the image processing device 53 via the I / F controller 52 incorporated in the multicolor stencil printing device. After that, the image is temporarily stored in the image memory 54. The image processing device 53 and the control device 55 of the multicolor stencil printing device are in a relationship of transmitting and receiving image data signals and command signals.

The characteristic control configuration around the control device 55 will be described in detail below. The control device 55 is equipped with a microcomputer, and is not shown in the figure, a CPU (central processing unit), an I / O (input / output) port, a RAM (readable / writable storage device), a ROM (read-only storage device). , A timer, etc., and connected by a signal bus or the like.

The above-mentioned CPU of the control device 55 (hereinafter sometimes simply referred to as "control device 55") has not only a calculation / arithmetic function but also a control function described later. Controller 55
Is operated through a sensor input circuit (not shown), the input port, and the like, and various keys of the operation panel 90 and the plate discharge plate feeding device position detection device 56 (the stop position sensor 56 as described above).
And the full detection sensor 83 of the plate discharging and plate feeding apparatus 2 respectively, and receives signals output from the stop position sensors 56A to 56D and the full detection sensor 83.

Further, the control device 55 controls the liquid crystal drive circuit (not shown), various motor drive circuits, the output port and the like, and the guidance section 95A and the auxiliary display section 95B of the liquid crystal display section 95 of the operation panel 90 and the print drum. The thermal head 5 is connected via the rotary drive unit 58 and the thermal head drive unit 6 which is a main controlled component of the plate making apparatus 1.
Is electrically connected to the plotter motor 35 and the electromagnetic clutch 36, and sends various command signals, which will be described later, to the thermal head 5, the plotter motor 35, and the electromagnetic clutch 36 via the thermal head drive device 6. Control their operation.

Further, the control device 55 drives the plate feed motor 41, which is a main control target component of the plate discharge plate feed apparatus 2, via various motor drive circuits and solenoid drive circuits (not shown), the output port, and the like. The motor 49, the plate discharge motor 60, the solenoid 73, and the lift motor 81 are electrically connected to each other, and various command signals, which will be described later, are supplied to the plate supply motor 41, the drive motor 49, and the plate discharge motor 6.
0, the solenoid 73 is sent to the lifting motor 81 to control their operation.

In the first embodiment, the control functions peculiar to the control device 55 are as follows. First, the control device 55 refers to the output signal from the plate discharge plate feeding device position detection device 56 every time the plate feed of each of the printing drums A to D is performed, and the plate discharge plate feeding device 2 sets the first position P1. After controlling the drive motor 49 so as to move to the (home position), the plate supply motor 41 is controlled so as to receive and hold the leading end of the plate-finished master 3 from the plate-making apparatus 1, and then each printing drum A By repeating the operation of stopping at each of the stop positions of D to D and passing the leading end of the plate-made master 3 to the master clampers 59A to 59D of the respective print drums A to D, all (in this embodiment 1, 4) It has a function of feeding the master 3 which has been prepressed to the printing drums A to D.

Secondly, the control device 55 receives the bottom dead center detection signal from the full detection sensor 83 based on the full detection signal from the full detection sensor 83, that is, even after a lapse of a predetermined time from the time when the lifting motor 81 is turned on. Has a function of controlling the drive motor 49 so that the plate discharge plate feeding apparatus 2 automatically moves to the second position P2 and stops when no is output.

Thirdly, the control device 55 displays and informs that the inside of the plate discharge storage box 42 is full with the plate discharged (used master 3) based on the full detection signal from the full detection sensor 83. As it does, it has a function of controlling the guidance section 95A and / or the auxiliary display section 95b of the operation panel 90 via the liquid crystal drive circuit.

Fourthly, the control device 55 controls each printing drum A
When any one of the master clampers 59A to 59D of D to D holds the front end portion of the master 3 having the plate-making, when the printing drums A to D rotate to wind the master 3 having the plate-making, the plate feeding is performed. In order to apply a brake resistance to the master 3 to be processed, it has a function of exciting the plate feeding motor 41 so that the upper plate feeding roller 44a stops rotating.

The ROM of the control device 55 stores programs and data for executing the operation of the multicolor stencil printing machine described in each operation example described later. The setting of the program, data, etc. is performed by giving data to the ROM in advance, or by replacing the ROM chip. The RAM of the control device 55 temporarily stores the calculation / calculation results of the CPU, and stores the ON / OFF signals and data signals input from the sensors, various keys, and the like as needed.

Next, the operation of the multicolor stencil printing machine will be described. In the initial state of the multicolor stencil printing machine, the plate discharge and supply apparatus 2 is in the first position P1 (home position) shown in FIG.
, And the plate discharge peeling unit 68 of the plate discharging means 40 is set in a state of occupying the non-peeling position by the urging force of the spring. On the plate making apparatus 1 side, the master 3
As shown by the solid line in FIG. 1, the leading end 3d of the above is set to a position slightly protruding from the nip portion of the master discharge roller pair 7a, 7b to the downstream side in the master conveying direction. Also,
The printing drum A is set in a state of occupying the plate feeding position shown in FIGS. After printing or when a power switch (not shown) is turned on, the plate making device 1, the plate discharge and plate feeding device 2 and the printing drum A are set so as to automatically occupy the above-mentioned initial state. Begins.

First, when an operator turns on a power switch (not shown), the operation panel 90 and the control device 55 are activated, and at the same time, electric power can be supplied to each device / section. At this time, the plate making apparatus 1 and the plate discharge plate feeding apparatus 2
The print drum A occupies the initial state. Before and after the operation of turning on the power switch, for example, when there is a shortage of the printing paper P used in the current printing on the paper feeding tray 14 of the paper feeding device 37, the printing paper P is used in the current printing. After appropriately replenishing and stacking the printing paper P of the paper type on the paper feed table 14, for example, by pressing a paper feed table lifting key (not shown),
The uppermost surface of the printing paper P stacked on the paper feed tray 14 is brought to a position (paper feed position) where paper can be fed.

Before and after the above operation, the operator places a color original on the contact glass of the original reading device, closes the pressure plate, and then presses the plate making start key 91 of the operation panel 90. Then, the color separation scanner 50 shown in FIG. 7 operates and the reading of the original image is performed by a known operation. An original image read by the color separation scanner 50 or a color original image created on the personal computer 51 is further optimally edited / corrected on the personal computer 51 by the operator. Next, when the operator presses the plate making start key 91 again, the optimally edited / corrected color original image on the personal computer 51 is output as four separated image data, and the I / I of the multicolor stencil printing apparatus is output. Image processing device 5 via F controller 52
After being taken in by 3, the image is temporarily stored in the image memory 54. When it is desired to continuously scan a plurality of originals for plate making, the originals are placed on the original cradle (not shown) of the ADF section, and the originals are automatically separated one by one and then placed on the contact glass. The image is read while the color separation scanner 50 is fixed at a fixed position while being fed.

If the control device 55 confirms from the output signal from the stop position sensor 56A that the plate discharge plate feeding device 2 is in the first position P1 (home position) as shown in FIG. By operating the drive mechanism of the opening / closing device, the master clamper 59A of the printing drum A in the state of occupying the plate feeding position is opened, and the master clamper 59A of the printing drum A is used at the time of the previous printing and is directly placed on the plate cylinder 13 of the printing drum A. The front end of the wound master 3 used is opened.

Then, the control device 55 turns on the solenoid 73 and at the same time drives the plate discharge motor 60 to rotate.
Further, the main motor of the printing drum rotation driving device 58 is rotationally driven. As a result, the pair of arm side plates 72, 72 is moved in the direction of the arrow in FIG. 2 (clockwise) so that the plate discharge unit 68 occupies the peeling position about the central support shaft 71 against the biasing force of the spring of the displacement means. 2, the plate discharge / peeling roller 69 contacts and presses against the tip of the used master 3 on the printing drum A rotating in the direction of the arrow in FIG. Can be scooped up. Further, the used master 3 that has been peeled off is conveyed to the upper portion by the sandwiching action between the plate discharge peeling roller 69 and the plate discharge roller 70 that rotate in the direction of the arrow in FIG. 2 and the rubber belts 75 and 77 that rotate in the direction of the arrow in FIG. 2 is conveyed in the direction of the left arrow in FIG. 2 by the sandwiching action between the rubber belts 77 and 78 that rotate in the direction of the arrow in FIG. The plate discharge (used master 3) stored in the plate discharge storage box 42 is compressed by the compression plate 82 descending by the rotation drive of the lifting motor 81.

On the other hand, in parallel with the plate discharging operation, the plate making apparatus 1 side performs the plate making operation according to the image data of the first color (Y). That is, the image data stored in the image memory 54 is sent to the thermal head driving device 6 while being subjected to appropriate image processing by the image processing device 53. At the same time, an appropriate energizing pulse width (energy for punching) set by a command from the control device 55 is also sent to the thermal head driving device 6. In accordance with the digital image signal sent from the thermal head driving device 6 and the energizing pulse width, a plurality of heating elements linearly arranged on the thermal head 5 are selectively heated and pressed by the thermal head 5 against the platen roller 4. The thermoplastic resin film portion of the master 3 is selectively melted and perforated.

At the same time, when the plotter motor 35 is driven to rotate, the platen roller 4 and the tension roller pairs 9a and 9b rotate in the direction of the arrow in FIG. As the sheet is conveyed to the left in FIG. 2 (downstream of the master conveying direction) and the suction fan 61 is simultaneously actuated, the conveyed plate-making master 3 bends while bending. It is transported to the inside of 62 and temporarily stored. At this time, the electromagnetic clutch 36 is off, so that the rotational driving force of the plotter motor 35 is not transmitted to the master discharge roller pair 7a, 7b, and the master discharge roller pair 7a, 7b remains stopped.

When the plate discharging operation is completed, the printing drum A stops at the plate feeding position shown in FIG. And again
When the drive mechanism of the opening / closing device is operated, the master clamper 59A of the print drum A is in the expanded state. When the control device 55 determines that a predetermined amount of flexure is formed in the plate-making master 3 by rotating the plotter motor 35 by a predetermined number of steps, the electromagnetic clutch 3
6 is turned on, and the plate feeding motor 41 is also rotationally driven. As a result, the master discharge roller pair 7a, 7b and the plate supply roller pair 44a, 44b rotate in the directions of the arrows in FIG.
While d is guided downward by the pair of guide plates 45a and 45b, it is conveyed toward the expanded master clamper 59A.

Then, it is determined that the plate-making master 3 has been conveyed by a predetermined amount by the rotational driving of the plate feeding motor 41 by a predetermined number of steps, and the leading end 3d of the plate-making master 3 has reached the widened master clamper 59A. At this point, the master clamper 59A of the printing drum A is closed by operating the drive mechanism of the opening / closing device again, and the plate feeding motor 41 is turned off.

When the front end of the plate-made master 3 is clamped by the master clamper 59A, the main motor of the print drum rotation driving device 58 is driven to rotate again, and the print drum A rotates in the direction of the arrow in FIG. Then, the master 3 that has been prepressed is wound around the plate cylinder 13 of the printing drum A. At this time, the plate feed motor 41 is excited to stop the rotation of the plate feed roller 44a on the upper side of the plate feed roller pair 44a, 44b, and brake resistance is applied to the plate-making master 3 wound around the outer peripheral surface of the plate cylinder 13. Therefore, even if the master 3 is relatively thin, it is possible to prevent the occurrence of winding wrinkles and tarmi.

After exciting the plate feeding motor 41, the plate feeding roller 44a above the plate feeding roller pair 44a, 44b is in a stopped (locked) state by receiving a holding load due to the excitation of the plate feeding motor 41, Plate feeding roller pair 44
The plate feed roller 44b on the lower side of a and 44b is rotated and driven by the conveying force of the master 3 which has been plate-formed by the rotation of the printing drum A. In this state, an appropriate back tension is applied to the plate-finished master 3 between the plate feed roller pairs 44a and 44b and the master clamper 59A.

When the control device 55 determines that the master 3 for which one plate has been made has been made by driving the plotter motor 35 by a predetermined number of steps, the cutter motor is rotated to make the plate. Of the master 3 is cut into a predetermined length by the rotary cutter 8, and the cut rear end of the master 3 that has been plate-cut is the plate cylinder 13 of the printing drum A
When it is completely wound on the plate, the plate feeding operation ends.

When the plate feeding operation to the printing drum A is completed,
Subsequently, on the plate making apparatus 1 side, the plate making operation according to the image data of the second color (M) is performed in substantially the same manner as in the case of the first color (Y). When the control device 55 determines that a predetermined amount of bending has been formed in the plate-making master 3 by rotating the plotter motor 35 by a predetermined number of steps, the electromagnetic clutch 36 is turned on and the plate feeding motor 41 is also turned on. It is driven to rotate. As a result, the master discharge roller pair 7a, 7
b and the pair of plate feeding rollers 44a and 44b rotate in the directions of the arrows in FIG.
When the front end 3d of the master 3 is fed by a predetermined length so as to be delivered to the plate discharge plate feeder 2, that is, the front end 3d of the master 3 which has been plate-making is gripped by the nip portion of the plate feed roller pair 44a, 44b, and from this nip portion. At a point slightly protruding to the left in FIG. 2, the electromagnetic clutch 36 is turned off and the plate feeding motor 41 is also turned off.

As a result, the leading end of the master 3 which has been plate-making is held in a state of being gripped by the nip portion of the plate feed roller pair 44a, 44b. If the control device 55 determines that a predetermined amount (one plate's worth) of flexure has been formed in the master 3 that has already been plate-made after that, the plate-making operation for the second color (M) is completed. To do. During the plate making operation of the second color (M), the main motor of the printing drum rotation driving device 58 is rotationally driven, so that the printing drum B rotates to occupy the plate feeding position, and the printing drum B moves to the plate feeding position. Occupy and stop. Then, the drive mechanism of the opening / closing device is operated to open the master clamper 59B of the printing drum B in the state of occupying the plate feeding position, as in the case of the printing drum A of the first color (Y). The printing drum B is ready for plate ejection.

Next, the controller 55 drives the drive motor 49 to rotate (for example, forward rotation) to perform the plate discharge and plate supply operations on the printing drum B, so that the plate discharge plate supply device 2 is guided to the guide rail 46. While moving to the left Xa in FIG.
Move to. At this time, the tip 3d of the master 3 that has been prepressed
Is held in the nip portion of the plate feed roller pair 44a, 44b, and is thus sent out from the plate making apparatus 1 during plate making while being absorbed in a mode in which the amount of bending generated is reduced. Immediately before the plate discharge plate feeder 2 moves,
When the electromagnetic clutch 36 is turned on, the rotational driving force of the plotter motor 35 is applied to the master discharge roller pair 7a, 7b.
Is transmitted to the master discharge roller pair 7a, 7b, and the master 3 having been plate-finished is sent out. At this time, the moving speed of the plate discharge plate feeding apparatus 2 is set to the master discharge roller pair 7a, 7b.
The speed is set to be approximately the same as or slightly faster than the master transport speed sent from the.

When the movement of the plate discharge plate feeder 2 reaches the plate feed stop position substantially directly above the printing drum B, that is, when the stop position sensor 56B detects the ON state, the controller 55 outputs the stop position sensor 56B. Based on the ON detection signal,
By turning off the drive motor 49, the plate discharge plate feeding device 2
Stops at the plate feed stop position of the printing drum B. If the plate discharge device 2 is stopped at the plate supply stop position of the printing drum B,
The solenoid 73 is turned on, and the plate discharge motor 60 and the main motor of the print drum rotation drive device 58 are driven to rotate, so that the plate discharge operation is performed as in the case of the print drum A for the first color (Y).

When the plate discharging operation for the second-color (M) printing drum B is completed, the master clamper 59B of the printing drum B is expanded by operating the drive mechanism of the opening / closing device again. Become. Plotter motor 35
When the control device 55 determines that the predetermined amount of plate making has been performed by the rotation driving of the predetermined number of steps, the plate feeding motor 41 is rotationally driven. As a result, the master discharge roller pair 7a, 7b and the plate feed roller pair 44a, 44b rotate in the direction of the arrow in FIG. Master clamper 59B expanded while being
Be transported to.

Then, it is determined that the plate-making master 3 has been conveyed by a predetermined amount by the rotational driving of the plate feeding motor 41 by a predetermined number of steps, and the leading end 3d of the plate-making master 3 has reached the widened master clamper 59B. At this point, the drive mechanism of the opening / closing device is actuated again to close the master clamper 59B of the print drum B.

When the front end of the master 3 that has undergone plate making is clamped by the master clamper 59B, the main motor of the print drum rotation drive device 58 is driven to rotate again, and the print drum B rotates in the direction of the arrow in FIG. Then, the plate-made master 3 is wound around the plate cylinder 13 of the printing drum B. At this time, as in the case of the print drum A for the first color (Y), the plate supply motor 41 is excited to stop the rotation of the plate supply roller 44a on the upper side of the plate supply roller pair 44a, 44b and stop ( Since the brake resistance is applied to the master 3 that has been plate-formed and is wound around the outer peripheral surface of the plate cylinder 13 in the locked state, it is possible to prevent winding wrinkles and lumps even if the master 3 is relatively thin. When the control device 55 determines that the master 3 for which one plate has been prepressed has been prepressed by driving the plotter motor 35 by a predetermined number of steps, the cutter motor is driven to rotate, and thus the premastered master 3 is produced. When the rear end of the master plate 3 is cut to a predetermined length by the rotary cutter 8 and the cut rear end of the master 3 is completely wound around the plate cylinder 13 of the printing drum B, the plate feeding operation ends. To do.

When the plate feeding operation to the printing drum B is completed,
The control device 55 rotationally drives (for example, reversely drives) the drive motor 49 to move the plate discharge plate feeding device 2 in the right direction Xb in FIG. 2 to return it to the home position which is the first position P1. Then, the movement of the plate discharge plate feeder 2 to the first position (home position) is stopped by the stop position sensor 56A.
When it is confirmed by the detection of ON, the control device 55 turns off the drive motor 49, so that the plate discharge plate feeder 2 stops at the first position P1 (home position).

During the movement of the plate discharge plate feeding apparatus 2 to the first position P1 (home position), the plate making apparatus 1 then performs the plate making operation in accordance with the image data of the third color (C).
Almost the same as in the case of the color (M), it has already been performed. When the control device 55 determines that a predetermined amount of flexure has been formed in the plate-making master 3 by rotating the plotter motor 35 by a predetermined number of steps, the electromagnetic clutch 3
6 is turned on, and the plate feeding motor 41 is also rotationally driven. As a result, the master discharge roller pair 7a, 7b and the plate supply roller pair 44a, 44b rotate in the directions of the arrows in FIG.
When d is sent for a predetermined length so as to be delivered to the plate discharge plate feeding apparatus 2, that is, the leading end 3d of the plate-making master 3 is held at the nip portion of the plate feeding roller pair 44a, 44b, and from this nip portion, When it slightly protrudes to the left of, the electromagnetic clutch 36 is turned off and the plate feeding motor 4
1 is also turned off.

As a result, the leading end of the master 3 that has been plate-made is held in a state of being gripped by the nip portion of the plate feed roller pair 44a, 44b. If the control device 55 determines that the plate-making master 3 is flexed by a predetermined amount (one plate) after that, the plate-making operation for the third color (C) is completed. To do. During the plate making operation of the third color (C), the main motor of the printing drum rotation driving device 58 is driven to rotate, so that the printing drum C rotates to occupy the plate feeding position, and the printing drum C moves to the plate feeding position. Occupy and stop. Then, the drive mechanism of the opening / closing device is actuated to set the master clamper 59C of the printing drum C in the state of occupying the plate feeding position to the opened state, as in the case of the printing drum A of the second color (Y). The printing drum C is ready for plate ejection.

Next, the controller 55 drives the drive motor 49 to rotate (for example, forward rotation) so as to perform the plate discharge and plate supply operations on the printing drum C, so that the plate discharge plate supply device 2 is guided to the guide rail 46. While moving to the left Xa in FIG.
Move to. At this time, the tip 3d of the master 3 that has been prepressed
Is held in the nip portion of the plate feed roller pair 44a, 44b, and is thus sent out from the plate making apparatus 1 during plate making while being absorbed in a mode in which the amount of bending generated is reduced. Immediately before the plate discharge plate feeder 2 moves,
When the electromagnetic clutch 36 is turned on, the rotational driving force of the plotter motor 35 is applied to the master discharge roller pair 7a, 7b.
Is transmitted to the master discharge roller pair 7a, 7b, and the master 3 having been plate-finished is sent out.

When the movement of the plate discharge plate feeder 2 reaches the plate feed stop position substantially directly above the printing drum C, that is, when the stop position sensor 56C detects the ON state, the controller 55 outputs the stop position sensor 56C. Based on the ON detection signal,
By turning off the drive motor 49, the plate discharge plate feeding device 2
Stops at the plate feed stop position of the printing drum C. Hereinafter, similarly to the plate discharging operation and the plate supplying operation to the second color (M) printing drum B, the plate discharging operation and the plate supplying operation to the third color (C) printing drum C are performed. These operations are performed by the "second color (M) printing drum B" and the "master clamper 59".
By replacing "B" with "3rd color (C) printing drum C" and "master clamper 59C", the description will be omitted because it can be easily implemented.

When the plate feeding operation to the printing drum C is completed,
The controller 55 rotationally drives (for example, reversely drives) the drive motor 49, whereby the plate discharge plate feeder 2 again moves to the right direction Xb in FIG. 2 and is returned to the home position which is the first position P1. . Then, the movement of the plate discharge plate feeder 2 to the first position (home position) causes the stop position sensor 5 to move.
When it is confirmed by the ON detection of 6A, the control device 55 turns off the drive motor 49, so that the plate discharge plate feeding device 2
Stops at the first position P1 (home position).

Thereafter, similar to the plate making operation according to the third color (C) image data, the plate making operation according to the fourth color (Bk) image data is performed. Similarly to the movement of the third color (C) printing drum C to the plate feeding stop position, the fourth color (Bk) printing drum D is moved in the same manner as the plate ejection operation and the plate feeding operation of the third color (C) printing drum C. The movement to the plate supply stop position, the plate discharge operation to the printing drum D of the fourth color (Bk), and the plate supply operation are performed. In this operation, the “third color (C) print drum C”, the “master clamper 59C” and the “stop position sensor 56C” are set to the “fourth color (Bk) print drum D”,
"Master clamper 59D" and "Stop position sensor 56"
The description will be omitted because it can be easily implemented by replacing it with “D”. When the plate feeding operation for the printing drum D is completed, the plate discharging plate feeding apparatus 2 is again operated as described above.
Stops at the first position P1 (home position).

After the master 3 of the first color (Y) to the fourth color (Bk) which has been plate-formed is wound around the plate cylinder 13 of the printing drums A to D, the printing process is started. First, the paper feeding device 37
By rotating the paper feeding roller 15 and the separating roller 16 of the above, the uppermost printing paper P stacked on the paper feeding table 14 is separated one by one by the cooperation action of the separating roller 16 and the separating pad 17. Is sent out, and further, a pair of transport rollers
The sheet 8 is conveyed toward the registration roller pair 19 by the means 8, and the leading end portion of the printing paper P is temporarily stopped at the nip portion of the registration roller pair 19, and the oblique displacement or the like is corrected by a method such as excessive feeding.

Next, by the registration roller pair 19, the timing belts 22a and 22b of the paper transporting device 21 in which the front end of the printing paper P rotates in synchronization with the rotation of the printing drum A.
The printing paper P is delivered at the same timing as the expanded paper leading edge clamper 20a of FIG. Thus, the leading edge of the printing paper P is clamped by the leading edge clamper 20a and conveyed.

The leading edge of the printing paper P is the leading edge clamper 2 of the paper.
When clamped to 0a, the timing belts 22a, 2
The print sheet P is conveyed in the sheet conveying direction X1 by the rotation of 2b, and first, the press roller 25A is displaced upward by the operation of the contact / separation displacement means (not shown), so that the print sheet P is transferred to the plate-made master 3 on the print drum A. The first color (Y) ink is transferred to the surface of the printing paper P from the punched portion of the master 3 that has been pressed, and a printing image corresponding to the printing image is formed, and stencil printing is performed. Similarly, the press rollers 25B, 25C, and 25D sequentially press the printing paper P against the master 3 that has been prepressed on the printing drums B, C, and D, so that a desired multicolor printing image (here, four-color printing is performed). Image) is formed. At this time, the ink roller 10 in each of the printing drums A to D is also printed in the printing drum A.
The ink is supplied to the inner peripheral surfaces of the printing drums A to D by rotating in the same direction as the rotation directions of the to D.

The four-color overprinted printing paper P is clamped by the paper leading edge clamper 20a and is further transported to the downstream side in the paper transporting direction X1, where the timing belt 29a is located at the portion indicated by the arrow E in FIG. , 29b are delivered to the discharged and stacked paper clamper 26. And as it is,
The leading edge of the printing paper P is clamped by the discharged and stacked paper clamper 26 and is conveyed to the downstream side by the rotational conveyance of the timing belts 29a and 29b. The sheet is opened, released, and dropped, and the leading edge of the printing paper P collides with the end fence 32 and stops, and is stacked and stored while being neatly aligned on the discharged paper stacking storage tray 28.

After the printing on the plate, each press roller 25A
.About.25D are separated from the print drums A to D and returned to the initial position which is also a non-pressing position to enter the print standby state. After the printing on the plate is completed, the operator appropriately checks the printed matter discharged onto the discharged sheet stacking storage tray 28 to appropriately determine whether or not the normal printing operation may be performed. When the number of prints is set with the ten key 93 and the print start key 92 is pressed, the steps of feeding, printing and discharging are repeated by the set number of prints in the same process as described above, and all the stencil printing is performed. The process ends.

In this way, while the stencil printing is carried out over many plates, the plate discharge (used master 3) stored in the plate discharge storage box 42 of the plate discharge plate feeding apparatus 2 becomes full. When the plate discharge in the plate discharge storage box 42 becomes full, the controller 55 does not output the bottom dead center detection signal from the full detection sensor 83 even if a predetermined time has elapsed from the time when the lifting motor 81 was turned on during the plate discharge compression operation. Based on this, the drive motor 49 is rotationally driven while referring to the time measured by the timer, so that the plate discharge plate feeder 2 moves to the second position P2 and stops as shown in FIG.

If the control device 55 confirms that the plate discharge plate feeder 2 has stopped at the second position P2 shown in FIG. 1 based on the output signal from the stop position sensor 56D, the guidance of the operation panel 90. In the area 95A, for example, a message such as "The plate discharged in the plate discharge storage box is full, please discard it" is displayed, or the main device part of the multi-color stencil printer of the auxiliary display part 95b is lit or blinked. Show·
Let me know. Therefore, the operator uses the guidance section 95A.
By visually recognizing the above-mentioned message or pictorial display on the auxiliary display portion 95b, opening the plate discharge cover 80 and grasping the handle 42a of the plate discharge storage box 42, the plate discharge storage box 42 can be easily and easily taken out and the plate discharge can be discarded. can do.

As described above, according to the first embodiment, in addition to the peculiar effect described later, the following advantages can be obtained. That is, firstly, by adopting the sheet transport device 21, it is possible to perform highly accurate sheet transport without variations in resist and highly accurate alignment transport without color misregistration necessary for print image formation. Secondly, the print paper P can be conveyed at a right angle to the drum axis Aa of each of the print drums A to D, and the skew of the print paper P at the time of paper conveyance can be prevented. Thirdly, since the width between the pair of timing belts 22a and 22b is larger than the maximum width of the printing paper P orthogonal to the paper transport direction X1, the paper leading edge clamper 20a having a width larger than the width of the printing paper P, 20
b, 20c (holding means) can be arranged, and it is possible to prevent the holding ratio (holding ratio) of the paper leading edge clampers 20a, 20b, 20c from changing depending on the size of the printing paper P.

Fourth, the timing belts 22a and 22b
Is a multiple of the outer circumference of each of the printing drums A to D, and the timing belts 22a and 22b
Since the number of teeth or the number of pitches is a multiple of the total number of teeth of the toothed drive pulley 23 and the toothed driven pulley 24, the rotation cycle of each of the printing drums A to D and the timing belts 22a and 22b are Leading edge clamper 20 placed in
The movement cycles of a, 20b, and 20c can be easily and accurately synchronized, highly accurate resist transfer can be performed, and positional deviation and color misregistration of printed images can be prevented with high accuracy. Further, as a matter of course, the arrangement of the peeling means such as the peeling claw or the air knife for forcibly preventing the printing paper P from being rolled up on each of the printing drums A to D as in the conventional multicolor stencil printing apparatus. Can be unnecessary.

The method of applying the braking force as the rotational friction resistance force to the pair of plate feeding rollers 44a and 44b is the above-mentioned system, for example, by reducing the current to be supplied to excite the plate feeding motor 41. The holding load force due to the excitation of the plate feeding motor 41 may be adjusted. That is,
When any one of the master clampers 59A to 59D of the print drums A to D holds the front end portion of the master 3 having the plate-making, and then the print drums A to D rotate to wind the master 3 having the plate-making. In addition, the method of applying the brake resistance to the master 3 to be plate-supplied is not limited to the above-described method, but at least one of the plate-supplied rollers 44a and 44b stops rotating or rotates together to cause the master 3 to be plate-supplied. It may be configured to provide a brake resistance (see claim 6).

In the above-mentioned specific example, in addition to the plate feeding motor 41, for example, an electromagnetic clutch is provided between the shaft of the plate feeding roller 44a and the rotation transmitting means such as gears and pulleys attached thereto. May be controlled to be turned on / off. That is, the rotational driving force of the plate feeding motor 41 is transmitted as it is by turning on the electromagnetic clutch until the master 3 having been plate-made is held by the master clampers 59A to 59D in the initial stage of the plate feeding operation. When the master clampers 59A to 59D hold the leading end of the plate-made master 3 and each of the printing drums A to D rotates to wind the plate-made master 3, the electromagnetic clutch is turned off to feed the plate. The rotational driving force of the motor 41 may be cut off, and the frictional resistance force of the rotation of the plate feeding roller 44a may act as a brake resistance.

The plate feed motor 41 and the electromagnetic clutch are not limited to being arranged on the plate feed roller 44a side.
For example, it may be arranged on the lower plate feeding roller 44b side. Further, the present invention is not limited to the above example, and the plate feeding roller pair 44a,
For example, a one-way clutch may be interposed between at least one of the shafts of the shaft 44b and a rotation transmitting member such as a gear or a pulley attached to the shaft, or a rotating system of a roller with a built-in brake may be adopted. Good.

(Embodiment 2) FIGS. 7 and 8 show a second embodiment of the present invention (hereinafter referred to as "embodiment 2"). In comparison with the multicolor stencil printing apparatus according to the first embodiment, the second embodiment has a plate discharge plate feeding apparatus 200 shown in parentheses in FIG. 7, instead of the plate discharge plate feeding apparatus 2, and a control device. The control function of 55 is different mainly in that it has a control function of controlling the plate supply motor 241 which is shown in parentheses in FIG. 7 instead of the plate supply motor 41. The plate discharge plate feeder 200 differs from the plate discharge plate feeder 2 of the first embodiment only in that it has a plate feed guide portion 243 as plate feed guide means shown in FIG. 8 instead of the plate feed guide portion 43. To do.

The plate feed guide portion 243 includes a rotatable plate feed roller 63, two rotatable plate feed guide rollers 65,
Several rubber belts 64, which are stretched between 66 and are in pressure contact with the plate feeding roller 63, are connected to the shaft of the upper plate feeding guide roller 65 (driving roller) via a rotation transmitting means such as a gear or pulley and a timing belt. Plate feeding motor 241 as a driving means for rotating the plate feeding guide roller 65.
And as an auxiliary guide member that guides the front end 3d of the master 3 that has been made by being sandwiched between the plate supply roller 63 and the rubber belt 64 toward the expanded master clamper 59 of each of the printing drums A to D. Guide plates 67a, 67b
It is mainly composed of and.

The plate feeding roller 63 and the two plate feeding guide rollers 65 and 66 are rotatably supported on the frame 2A side at both ends of their respective shafts through bearings (not shown). Plate feeding roller 63 and two plate feeding guide rollers 6
Each of the shafts 5, 66 is formed by dividing the shaft into a plurality of skewered dumplings. The plate supply roller 63 and the rubber belt 64 are the master discharge roller pair 7a, 7b of the plate making apparatus 1.
It has a function / structure for receiving the front end of the plate-made master 3 sent out by the above at the first position P1, holding it, and feeding it to each of the printing drums A to D for plate feeding.

The plate feeding motor 241 is composed of a stepping motor as a driving means for inputting with a pulse. In comparison with the control device 55 in the first embodiment, the control device 55 in the second embodiment has one of the master clampers 59A to 59D of the respective print drums A to D in place of the fourth function thereof. After holding the leading end of the master 3, when the print drums A to D rotate to wind the master 3 that has been prepressed, the upper master plate is supplied so as to impart brake resistance to the master 3 that is supplied. The plate feed motor 2 is rotated so that the guide roller 65 stops rotating, that is, the rubber belt 64 stops rotating.
The only difference is that it has a fourth function of turning off 41.

Next, the operation of the second embodiment will be described focusing on the points different from the first embodiment. Printing drum A
When the plate discharge operation and the plate making operation for the first color (Y) are performed in the same manner as in Embodiment 1 and the plate discharge operation is completed, the printing drum A stops at the plate supply position shown in FIG. Then, the master clamper 59A of the print drum A is expanded again by operating the drive mechanism of the opening / closing device again. When the control device 55 determines that a predetermined amount of flexure is formed in the plate-making master 3 by the rotational driving of the plotter motor 35 by a predetermined number of steps, the electromagnetic clutch 36 is turned on and the plate feed motor 241 is turned on.
Is also driven to rotate. As a result, the master discharge roller pair 7
a, 7b, the plate feeding roller 63 and the rubber belt 64 are shown in FIG.
By rotating each in the direction of the middle arrow, the leading end 3d of the master 3 having been plate-finished is conveyed toward the expanded master clamper 59A while being guided downward by the pair of guide plates 67a and 67b.

Then, it is determined that the plate-making master 3 has been conveyed by a predetermined amount by the rotation driving of the plate feeding motor 241 and the tip 3d of the plate-making master 3 has reached the widened master clamper 59A. At this point, the drive mechanism of the opening / closing device is actuated again to close the master clamper 59A of the printing drum A, and
The plate feeding motor 241 is turned off.

When the front end of the master 3 that has undergone plate making is clamped by the master clamper 59A, the main motor of the print drum rotation drive device 58 is driven to rotate again, and the print drum A rotates in the direction of the arrow in FIG. Then, the master 3 that has been prepressed is wound around the plate cylinder 13 of the printing drum A. At this time, since the plate feeding motor 241 is kept off, the rotational friction resistance force of the plate feeding guide rollers 65 and 67 and the rubber belt 64 acts as an appropriate braking force. As a result, the master 3 that has been plate-finished is wound around the outer peripheral surface of the plate cylinder 13 while a proper tension is applied, so that even a relatively thin master 3 can be wound without causing winding wrinkles or tarmi. .

After the plate feeding motor 241 is turned off, the rubber belt 64 receives a load for stopping the plate feeding motor 241, so that the rubber belt 64 receives an appropriate rotational friction resistance force.
The plate feeding roller 63 below the rubber belt 64 is the printing drum A.
When the master 3 is finished, it is rotated and driven. In this state, the plate feeding roller 63, the rubber belt 64 and the master clamper 59 are
Appropriate back tension is applied to the master 3 that has been prepressed with A. The above operation is 2
The same applies to the winding of the master 3 that has been prepressed on the outer peripheral surface of the plate cylinder 13 of each of the printing drums B, C, and D for the color (M), the third color (C), and the fourth color (Bk).

According to the second embodiment, the plate feeding roller 63, the rubber belt 64, and the two plate feeding guide rollers 65 and 66 are provided in addition to the effects described below.
Since the front end 3d of the master 3 is arranged in a positional relationship of guiding the front end 3d of the master 3 substantially downward, it is possible to reliably guide the front end 3d of the master 3 that has been prepressed toward each of the master clampers 59A to 59D. A guide plate 67a,
It is also possible to remove 67b and eliminate it.

The method of applying the braking force as the rotational friction resistance force of the plate feed guide rollers 65 and 67 and the rubber belt 64 is the above-described system, for example, by exciting the plate feed motor 241 or by exciting it as in the first embodiment. In order to reduce the current to be supplied, the plate feed motor 2
The load force of the hold due to the excitation of 41 may be adjusted. When the plate feeding motor 241 is excited or when the current to be supplied to excite the plate feeding motor is reduced, the plate feeding guide rollers 65 and 67 and the rubber belt 64 are set to the plate feeding motor 2.
The holding load force due to the excitation of 41 is adjusted to a stopped (locked) state, and the lower plate feed roller 63 receives the conveying force of the master 3 that has been prepressed due to the rotation of the printing drum A, and is rotated and driven in rotation. do. In this state, a large back tension is adjusted and applied to the master 3 that has been plate-formed between the plate feeding roller 63 and the rubber belt 64 and the master clamper 59A, as compared with the case where the plate feeding motor 241 is simply turned off. Becomes

After any one of the master clampers 59A to 59D of the printing drums A to D holds the front end of the master 3 having the plate-making, the print drums A to D wind the master 3 having the plate making. A method of applying a brake resistance to the master 3 to be fed when rotating as much as possible
A configuration may be adopted in which at least one of 3 and the rubber belt 64 stops or rotates together to impart a brake resistance to the master 3 to be fed (see claim 7).

In the specific example, in addition to the plate feeding motor 241, for example, an electromagnetic clutch is interposed between the shaft of the plate feeding guide roller 65 and the rotation transmitting means such as gears and pulleys attached to the shaft. This may be ON / OFF drive controlled. That is, the rotational driving force of the plate feeding motor 241 is transmitted as it is by turning on the electromagnetic clutch until the master 3 having been plate-made is held by the master clampers 59A to 59D in the initial stage of the plate feeding operation. When the master clampers 59A to 59D hold the leading end of the plate-made master 3 and the printing drums A to D rotate to wind the plate-made master 3, the electromagnetic clutch is turned off to feed the plate. The rotational driving force of the motor 241 may be cut off and the frictional resistance force of the rotation of the plate feed guide roller 65 may be applied as a brake resistance.

The plate feed motor 241 and the electromagnetic clutch are not limited to being arranged on the plate feed guide roller 65 side, and may be arranged, for example, on the lower plate feed guide roller 66 side or the plate feed roller 63 side. It doesn't matter. Further, the present invention is not limited to the above example, and for example, a one-way clutch is provided between at least one of the shafts of the plate feed guide rollers 65 and 67 and the plate feed roller 63 and the rotation transmission members such as gears and pulleys attached thereto. It may be interposed, or a method of rotating the roller with a built-in brake may be adopted.

The embodiment of the present invention is not limited to the above-mentioned ones, but may be replaced with the sheet conveying device 21 or the ejected sheet conveying device 27 if the advantage of having the sheet conveying device 21 is not desired. In addition, a combination of an air suction type intermediate conveying device and a paper discharging conveying device similar to the conventional one may be used. Further, the print drum is not limited to the one having the four print drums A to D as described above, but may be two or three, for example.
Alternatively, it goes without saying that it may have five or more for multicolor printing. As described above, the present invention has been described with respect to specific embodiments and examples included in these, but the configuration of the present invention is not limited to the above-mentioned ones, and may be appropriately combined with each other.
Alternatively, it may be configured alone, and it is apparent to those skilled in the art that various embodiments and examples can be configured within the scope of the present invention according to the need, purpose, use, etc.

[0143]

As described above, according to the present invention,
By solving the problems of the prior art as described above,
A new multicolor printing device can be provided. The effects of each claim are as follows. According to the invention described in claim 1, with the above configuration, it is not necessary to dispose a plate making plate supply device and a plate discharging device for each printing drum as in the conventional case, and one plate making device and one plate discharging plate feeding device are required. Since it is sufficient that the multicolor printing apparatus has the above, the size of the entire multicolor printing apparatus does not become large, and the multicolor printing apparatus does not end up becoming an expensive multicolor printing apparatus. Moreover, since only the plate discharge plate feeding device is moved by the moving means, a large space and a special mechanism or driving device are not required for moving the plate discharging plate feeding device. Also, since only the plate discharge plate feeding device is moved, unlike the case where the plate making plate feeding device is moved, the power supply line and the operation control line are not connected, which makes it difficult to process the signal line and each line. There is no need for an excessive cost, and it is not necessary to accurately position the plate making device with respect to each printing drum.

According to the second aspect of the invention, the plate discharge plate feeding device moves to the first position close to the plate making device every time the plate is fed to each printing drum, and the front end portion of the plate-made master is moved. After receiving and holding all of the print drums, the operation of stopping at each stop position located almost directly above each print drum and passing the leading end of the plate-made master to each holding means is repeated. In addition to the effect of the invention described in claim 1, even if a method of moving only the plate discharge plate feeding device is adopted, the plate-making master that has been made by the plate-making device is omitted. A plate can be supplied to each of the printing drums arranged side by side in the horizontal direction.

According to the third aspect of the invention, the control means controls the moving means based on the full detection signal from the full detection means so that the plate discharge plate feeding apparatus automatically moves to the second position. Therefore, in addition to the effect of the invention described in claim 1 or 2, even if the system for moving only the plate discharge plate feeding device is adopted, the operator only needs to perform a simple operation such as opening the plate discharge cover. The stencil sheet storage means (for example, the stencil sheet discharging box) can be taken out and mounted without any troublesome operation.

According to the fourth aspect of the present invention, the control means notifies the fact that the used discharged master is full by the used master on the basis of the full detection signal from the full detection means. In addition to the effect of the invention according to claim 3, in addition to the effect of the invention described in claim 3, the operator can surely recognize visually or hearing that the plate discharge storage means (for example, the plate discharge box) is full of the used master. it can.

According to the fifth aspect of the present invention, when the plate discharge plate feeding device occupies the first position, the leading end of the master plate made by the plate making device passes through the plate feeding guide means as it is, and the plate making device is maintained. By being guided and conveyed to the holding means of the printing drum closest to the plate, the first position (for example, the home position) of the plate discharge plate feeding apparatus is most effective for the plate making apparatus in addition to the effect of the invention of claim 3 or 4. Since it coincides with the stop position of plate feeding to the nearby printing drum, it is possible to quickly start plate discharge operation, plate making operation and plate feeding operation without performing unnecessary movement operation, and to complete printing. The required time can be shortened. In other words, FPT (Fast Print Time) until the first printed material is obtained
Can be shortened.

According to the sixth aspect of the invention, after each holding means holds the front end of the plate-made master, when each printing drum rotates to wind the plate-made master, at least one of them is rotated. In addition to the effect of the invention according to any one of claims 2 to 5, the plate feed roller stops rotating or rotates together to impart a brake resistance to the plate feed master. Since the master is wound around each printing drum while being given an appropriate tension, even a thin master can be wound without wrinkles.

According to the invention described in claim 7, after each holding means holds the front end of the plate-made master, when each printing drum is rotated to wind the plate-made master, the plate feeding is performed. In addition to the effect of the invention according to any one of claims 2 to 5, by imparting a brake resistance to the master to be plate-supplied by stopping or rotating at least one of the roller and the belt. Since the master that has been prepressed is wound around each printing drum while being applied with an appropriate tension, even a thin master can be wound without wrinkles.

According to the invention described in claim 8, since the plate feed roller, the belt and the two plate feed guide rollers are arranged in such a positional relationship that the tip of the plate-making master is guided substantially right below. In addition to the effect of the invention described in claim 7, it is possible to reliably guide the leading end of the plate-making master toward each holding means, and it is possible to eliminate the need for guide means such as a guide member.

[Brief description of drawings]

FIG. 1 is a schematic front view of a multicolor stencil printing apparatus showing a first embodiment of a multicolor printing apparatus of the present invention.

FIG. 2 is a partial cross-sectional front view of the plate making apparatus and the plate discharge plate feeding apparatus in the multicolor stencil printing apparatus of FIG.

FIG. 3 is an exploded perspective view of a sheet conveying device in the multicolor stencil printing apparatus of FIG.

FIG. 4 is a perspective view of a timing belt in the paper transport device of FIG.

5 is an exploded perspective view of a paper leading edge clamper in the paper transporting device of FIG.

6 is a plan view of a main part of an operation panel in the multicolor stencil printing apparatus of FIG.

7 is a control block diagram showing a main control configuration in the multicolor stencil printing apparatus of FIGS. 1 and 8. FIG.

FIG. 8 is a partial cross-sectional front view of the periphery of a plate making apparatus and a plate discharge plate feeding apparatus in the multicolor stencil printing apparatus showing the second embodiment.

[Explanation of symbols]

1 plate making device 2,200 plate discharge plate feeding device 3 master 4 platen roller 5 thermal head 21 as plate making means paper transport devices 25A to 25D press roller 35 as pressing means 35 plotter motor 36 making up plate making device electromagnetic wave making up plate making device Clutch 37 Paper feeding device 38 Moving means 40 Plate discharge means 41, 241 Plate supply motor 42 as plate supply guide drive means constituting plate supply guide means 42 Plate discharge storage means 43, 243 Plate supply guide part 44a as plate supply guide means, 44b, 63 Plate feeding roller 64 Rubber belt 65, 66 as a belt Plate feeding guide roller 49 Drive motor 55 as a movement driving means which constitutes a moving means Control device 56 as a control means Plate discharge plate feeding device position detection devices 56A to 56D Stop Stop position sensors 59A to 59D as position detecting means As holding means Master clamper 60 plate discharge motor 73 constituting plate discharge means solenoid 83 constituting plate discharge means full detection sensor 90 as full detection means operation panel 95A guidance section 95B as notification means auxiliary display section 99 as notification means as printer main body Body frame A, B, C, D Printing drum P Printing paper P1 First position P2 Second position X Left-right direction X1 Paper transport direction

Claims (8)

[Claims] 1. A multi-color overprint having a plurality of printing drums around which an outer peripheral surface of a plate-made master is wound, and printing sheets are sequentially pressed while ink is supplied to the plate-made masters on these printing drums. In a multi-color printing apparatus capable of printing, one plate-making apparatus fixed to the main body of the printing apparatus and provided with plate-making means for making a master plate, a first plate-making apparatus provided between the printing drums and in the vicinity of the plate-making apparatus. Is movable to and from a position, and a plate discharging unit for peeling and discharging a used master on each of the printing drums, and a part of the plate-made master at the first position are received and held and supplied to each of the printing drums. One plate discharge plate feeding device provided with a plate plate feeding guide means for guiding and carrying to plate, and a moving means for moving the plate discharge plate feeding device between the respective printing drums and the first position. Specially having Multicolor printing device to be used. 2. The multicolor printing apparatus according to claim 1, wherein each of the printing drums is provided with a holding means for holding a leading end of a master, which is a plate-making master, as a part of the printing drum, and the printing drums are arranged in a substantially horizontal direction. It is arranged, the plate feeding position where each of the holding means stops the rotation of each of the printing drums in order to hold the leading end of the plate-making master, and the holding means is at a position substantially above the printing drums. The moving means is a guide means for guiding the plate discharge plate feeding device in the substantially horizontal direction above the respective printing drums,
A driving means for moving the plate discharge plate feeding device through the guide means, and a stop position detecting means for detecting that the plate discharge plate feeding device is at a stop position where the plate discharging plate feeder is stopped substantially directly above each of the printing drums. Then, the plate discharge plate feeder moves to the first position and receives and holds the leading end of the plate-making master every time the plate is fed to the printing drums, and then stops at the stop positions. A multicolor printing apparatus, characterized in that the plate-prepared master is fed to all of the plurality of printing drums by repeating the operation of passing the tip of the plate-prepared master to each of the holding means. 3. The multicolor printing apparatus according to claim 1 or 2, wherein the plate discharge plate feeding unit stores a plate discharge storing unit for storing a used master separated and discharged from each of the printing drums, and the plate discharge storing unit. Means for detecting that the used master is full, the first position is a position closest to the plate making apparatus, and the plate discharge plate feeding apparatus is the first position. It is movable between a position 1 and a second position where the plate discharge storage means can be detached and attached apart from the first position, and based on a full detection signal from the full detection means, A multicolor printing apparatus comprising: a control unit that controls the moving unit so that the plate discharge plate feeding apparatus automatically moves to the second position. 4. The multicolor printing apparatus according to claim 3, further comprising an informing means for informing that the plate discharge storage means is full of used masters, and the control means is the fullness detection. A multicolor printing apparatus, characterized in that the notifying means is controlled so as to notify that the used discharged master has become full with a used master based on a fullness detection signal from the means. 5. The multicolor printing apparatus according to claim 3 or 4, wherein when the plate discharge plate feeding device occupies the first position, the leading end of the master made by the plate making device is the plate feeding guide means. A multicolor printing apparatus, wherein the multicolor printing apparatus is guided and conveyed as it is to the holding means of the printing drum closest to the plate making apparatus. 6. The multicolor printing apparatus according to claim 2, wherein the plate feed guide means includes a pair of plate feed rollers rotatable in pressure contact with each other, After the means holds the front end of the plate-made master, when each of the printing drums rotates to wind the plate-made master, at least one of the plate feeding rollers stops rotating or rotates together, A multicolor printing device characterized by imparting brake resistance to a master to be supplied. 7. The multicolor printing apparatus according to claim 2, wherein the plate feed guide means is between a rotatable plate feed roller and two rotatable plate feed guide rollers. When the printing drum rotates to wind the master having been made after the holding drum holds the leading end of the master having been made, and the belt has a belt that is stretched around and is pressed against the plate feeding roller. Further, at least one of the plate feeding roller and the belt stops rotating or rotates together to impart brake resistance to the master to be fed. 8. The multicolor printing apparatus according to claim 7, wherein the plate feed roller, the belt, and the two plate feed guide rollers have a positional relationship that guides the leading end of a plate-finished master substantially right below. A multicolor printing device characterized by being arranged.